/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:31:32,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:31:32,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:31:32,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:31:32,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 21:31:32,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 21:31:32,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 21:31:32,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 21:31:32,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 21:31:32,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 21:31:32,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 21:31:32,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 21:31:32,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 21:31:32,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 21:31:32,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 21:31:32,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 21:31:32,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 21:31:32,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 21:31:32,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 21:31:32,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 21:31:32,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 21:31:32,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:31:32,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:31:32,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:31:32,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:31:32,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:31:32,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:31:32,171 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:31:32,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:31:32,172 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:31:32,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:31:32,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:31:32,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:31:32,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:31:32,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:31:32,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:31:32,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:31:32,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:31:32,175 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:31:32,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:31:32,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:31:32,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:31:32,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:31:32,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:31:32,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:31:32,504 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:31:32,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-06-12 21:31:32,505 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-06-12 21:31:32,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:31:32,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:31:32,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:32,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:31:32,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:31:32,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:32,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:31:32,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:31:32,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:31:32,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... [2021-06-12 21:31:32,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:31:32,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:31:32,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:31:32,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:31:32,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:31:32,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:31:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:31:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:31:32,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:31:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:31:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:31:32,664 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:31:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:31:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:31:32,664 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:31:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:31:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:31:32,664 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 21:31:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 21:31:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 21:31:32,666 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:31:33,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:31:33,113 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-12 21:31:33,114 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 21:31:33,114 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 21:31:33,115 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 21:31:33,115 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-12 21:31:33,116 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:33 BoogieIcfgContainer [2021-06-12 21:31:33,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:31:33,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:31:33,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:31:33,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:31:33,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:32" (1/2) ... [2021-06-12 21:31:33,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366c2e18 and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:31:33, skipping insertion in model container [2021-06-12 21:31:33,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:33" (2/2) ... [2021-06-12 21:31:33,129 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-06-12 21:31:33,134 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:31:33,134 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:31:33,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:31:33,135 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:31:33,168 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 21:31:33,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 21:31:33,212 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:31:33,212 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:31:33,212 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:31:33,212 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:31:33,213 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:31:33,213 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:31:33,213 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:31:33,213 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:31:33,220 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-06-12 21:31:33,239 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:31:33,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:33,251 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:33,251 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-06-12 21:31:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:33,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127271104] [2021-06-12 21:31:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:33,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:33,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127271104] [2021-06-12 21:31:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127271104] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:33,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:33,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010622382] [2021-06-12 21:31:33,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:33,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:33,428 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:33,472 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-06-12 21:31:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 21:31:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:33,480 INFO L225 Difference]: With dead ends: 94 [2021-06-12 21:31:33,480 INFO L226 Difference]: Without dead ends: 89 [2021-06-12 21:31:33,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-12 21:31:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-06-12 21:31:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-06-12 21:31:33,529 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-06-12 21:31:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:33,529 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-06-12 21:31:33,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-06-12 21:31:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:33,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:33,532 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:33,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:31:33,533 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-06-12 21:31:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:33,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217751011] [2021-06-12 21:31:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:33,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217751011] [2021-06-12 21:31:33,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217751011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138026413] [2021-06-12 21:31:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:31:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138026413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:33,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:33,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-12 21:31:33,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948958477] [2021-06-12 21:31:33,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:31:33,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:31:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:33,782 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:33,811 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-06-12 21:31:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 21:31:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:33,816 INFO L225 Difference]: With dead ends: 120 [2021-06-12 21:31:33,816 INFO L226 Difference]: Without dead ends: 106 [2021-06-12 21:31:33,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-12 21:31:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-06-12 21:31:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-06-12 21:31:33,840 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-06-12 21:31:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:33,841 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-06-12 21:31:33,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-06-12 21:31:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:33,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:33,845 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:34,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 21:31:34,061 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-06-12 21:31:34,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:34,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900793260] [2021-06-12 21:31:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:34,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900793260] [2021-06-12 21:31:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900793260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:34,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:34,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:34,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523399511] [2021-06-12 21:31:34,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:34,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:34,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,139 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:34,147 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-06-12 21:31:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 21:31:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:34,149 INFO L225 Difference]: With dead ends: 129 [2021-06-12 21:31:34,150 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 21:31:34,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 21:31:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-06-12 21:31:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-06-12 21:31:34,162 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-06-12 21:31:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:34,162 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-06-12 21:31:34,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-06-12 21:31:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:34,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:34,163 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:34,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:31:34,163 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:34,164 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-06-12 21:31:34,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:34,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110297459] [2021-06-12 21:31:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:34,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:34,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110297459] [2021-06-12 21:31:34,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110297459] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:34,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:34,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:34,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541181334] [2021-06-12 21:31:34,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:34,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,189 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:34,196 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-06-12 21:31:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 21:31:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:34,198 INFO L225 Difference]: With dead ends: 76 [2021-06-12 21:31:34,198 INFO L226 Difference]: Without dead ends: 64 [2021-06-12 21:31:34,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-12 21:31:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-12 21:31:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-06-12 21:31:34,204 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-06-12 21:31:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:34,204 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-06-12 21:31:34,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-06-12 21:31:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:34,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:34,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:34,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 21:31:34,206 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-06-12 21:31:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:34,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826886114] [2021-06-12 21:31:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:34,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826886114] [2021-06-12 21:31:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826886114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111625622] [2021-06-12 21:31:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:31:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:34,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111625622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:34,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:34,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-12 21:31:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346191409] [2021-06-12 21:31:34,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:31:34,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:34,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:31:34,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:34,445 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:34,477 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-06-12 21:31:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 21:31:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:34,480 INFO L225 Difference]: With dead ends: 115 [2021-06-12 21:31:34,480 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 21:31:34,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 21:31:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-12 21:31:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-06-12 21:31:34,501 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-06-12 21:31:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:34,501 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-06-12 21:31:34,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-06-12 21:31:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:31:34,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:34,505 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:34,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:34,717 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-06-12 21:31:34,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:34,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583457135] [2021-06-12 21:31:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:34,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:34,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583457135] [2021-06-12 21:31:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583457135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:34,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:34,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030430629] [2021-06-12 21:31:34,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,748 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:34,756 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-06-12 21:31:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 21:31:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:34,758 INFO L225 Difference]: With dead ends: 57 [2021-06-12 21:31:34,758 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 21:31:34,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 21:31:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-06-12 21:31:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-06-12 21:31:34,769 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-06-12 21:31:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:34,769 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-06-12 21:31:34,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-06-12 21:31:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:31:34,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:34,770 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:34,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 21:31:34,770 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:34,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-06-12 21:31:34,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:34,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094245474] [2021-06-12 21:31:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:34,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:34,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094245474] [2021-06-12 21:31:34,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094245474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998406818] [2021-06-12 21:31:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:34,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:34,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:31:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:35,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998406818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:35,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:35,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-12 21:31:35,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939492892] [2021-06-12 21:31:35,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:31:35,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:35,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:31:35,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:31:35,025 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:35,068 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-06-12 21:31:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:31:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 21:31:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:35,070 INFO L225 Difference]: With dead ends: 93 [2021-06-12 21:31:35,070 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 21:31:35,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:31:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 21:31:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-06-12 21:31:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-06-12 21:31:35,086 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-06-12 21:31:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:35,086 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-06-12 21:31:35,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-06-12 21:31:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:35,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:35,088 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:35,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:35,305 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-06-12 21:31:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:35,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138823214] [2021-06-12 21:31:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:35,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138823214] [2021-06-12 21:31:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138823214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625914692] [2021-06-12 21:31:35,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:35,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:31:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:31:35,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:35,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625914692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:35,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:35,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-12 21:31:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970059642] [2021-06-12 21:31:35,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:35,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:35,667 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:35,771 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-06-12 21:31:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:31:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:35,773 INFO L225 Difference]: With dead ends: 144 [2021-06-12 21:31:35,773 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 21:31:35,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 21:31:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-12 21:31:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-06-12 21:31:35,778 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-06-12 21:31:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:35,778 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-06-12 21:31:35,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-06-12 21:31:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:35,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:35,779 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:36,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:36,001 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-06-12 21:31:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:36,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799665544] [2021-06-12 21:31:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799665544] [2021-06-12 21:31:36,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799665544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028903643] [2021-06-12 21:31:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:36,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:36,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:31:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028903643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:36,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:36,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 21:31:36,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978390883] [2021-06-12 21:31:36,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:36,258 INFO L87 Difference]: Start difference. First operand 106 states and 370 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:36,313 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-06-12 21:31:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:31:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:36,315 INFO L225 Difference]: With dead ends: 179 [2021-06-12 21:31:36,315 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 21:31:36,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 21:31:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-06-12 21:31:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-06-12 21:31:36,320 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-06-12 21:31:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:36,321 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-06-12 21:31:36,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-06-12 21:31:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:36,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:36,322 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:36,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 21:31:36,537 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:36,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:36,537 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-06-12 21:31:36,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:36,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988121706] [2021-06-12 21:31:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:36,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988121706] [2021-06-12 21:31:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988121706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024479414] [2021-06-12 21:31:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:31:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:36,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024479414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:36,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:36,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-12 21:31:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555581692] [2021-06-12 21:31:36,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:31:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:31:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:36,862 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:36,941 INFO L93 Difference]: Finished difference Result 214 states and 744 transitions. [2021-06-12 21:31:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:31:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:31:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:36,944 INFO L225 Difference]: With dead ends: 214 [2021-06-12 21:31:36,944 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 21:31:36,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:31:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 21:31:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-06-12 21:31:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.751552795031056) internal successors, (604), 161 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-06-12 21:31:36,950 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-06-12 21:31:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:36,950 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-06-12 21:31:36,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-06-12 21:31:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:36,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:36,951 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:37,165 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-06-12 21:31:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785279580] [2021-06-12 21:31:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:37,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785279580] [2021-06-12 21:31:37,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785279580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763671641] [2021-06-12 21:31:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:31:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763671641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:37,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:37,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-12 21:31:37,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239423417] [2021-06-12 21:31:37,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:31:37,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:31:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:37,401 INFO L87 Difference]: Start difference. First operand 162 states and 604 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:37,423 INFO L93 Difference]: Finished difference Result 134 states and 469 transitions. [2021-06-12 21:31:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:31:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:31:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:37,425 INFO L225 Difference]: With dead ends: 134 [2021-06-12 21:31:37,425 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 21:31:37,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 21:31:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-12 21:31:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.624) internal successors, (453), 125 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-06-12 21:31:37,437 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-06-12 21:31:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:37,438 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-06-12 21:31:37,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-06-12 21:31:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:31:37,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:37,439 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:37,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:37,661 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-06-12 21:31:37,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:37,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920586411] [2021-06-12 21:31:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:37,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:37,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920586411] [2021-06-12 21:31:37,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920586411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:37,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921223182] [2021-06-12 21:31:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:37,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:37,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:37,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:37,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:37,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:37,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-12 21:31:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:38,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921223182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:38,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:38,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 21:31:38,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137748152] [2021-06-12 21:31:38,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:31:38,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:31:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:38,059 INFO L87 Difference]: Start difference. First operand 126 states and 453 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:38,237 INFO L93 Difference]: Finished difference Result 144 states and 499 transitions. [2021-06-12 21:31:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:31:38,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 21:31:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:38,238 INFO L225 Difference]: With dead ends: 144 [2021-06-12 21:31:38,238 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 21:31:38,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 21:31:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-06-12 21:31:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.5757575757575757) internal successors, (472), 132 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-06-12 21:31:38,243 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-06-12 21:31:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:38,243 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-06-12 21:31:38,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-06-12 21:31:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:31:38,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:38,245 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:38,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:31:38,468 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-06-12 21:31:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:38,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898566834] [2021-06-12 21:31:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:38,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:38,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898566834] [2021-06-12 21:31:38,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898566834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823321953] [2021-06-12 21:31:38,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:38,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:38,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823321953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:38,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:38,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-12 21:31:38,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919369443] [2021-06-12 21:31:38,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:31:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:31:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:38,820 INFO L87 Difference]: Start difference. First operand 133 states and 472 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:38,926 INFO L93 Difference]: Finished difference Result 261 states and 960 transitions. [2021-06-12 21:31:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 21:31:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:38,928 INFO L225 Difference]: With dead ends: 261 [2021-06-12 21:31:38,928 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 21:31:38,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 21:31:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-06-12 21:31:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.9404761904761907) internal successors, (662), 168 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-06-12 21:31:38,934 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-06-12 21:31:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:38,935 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-06-12 21:31:38,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-06-12 21:31:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:38,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:38,935 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:39,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 21:31:39,159 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-06-12 21:31:39,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:39,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136569233] [2021-06-12 21:31:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:39,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:39,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136569233] [2021-06-12 21:31:39,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136569233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:39,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670875755] [2021-06-12 21:31:39,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:39,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:31:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:39,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:39,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:39,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:39,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:39,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-12 21:31:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:39,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670875755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:39,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:39,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-12 21:31:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558527428] [2021-06-12 21:31:39,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:39,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:39,585 INFO L87 Difference]: Start difference. First operand 169 states and 662 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:39,774 INFO L93 Difference]: Finished difference Result 287 states and 1060 transitions. [2021-06-12 21:31:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:31:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:31:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:39,776 INFO L225 Difference]: With dead ends: 287 [2021-06-12 21:31:39,776 INFO L226 Difference]: Without dead ends: 275 [2021-06-12 21:31:39,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-12 21:31:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-06-12 21:31:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 4.0) internal successors, (752), 188 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-06-12 21:31:39,783 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-06-12 21:31:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:39,783 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-06-12 21:31:39,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-06-12 21:31:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:39,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:39,784 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:40,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:40,001 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-06-12 21:31:40,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:40,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698687299] [2021-06-12 21:31:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:40,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:40,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698687299] [2021-06-12 21:31:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698687299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:40,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565826011] [2021-06-12 21:31:40,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:40,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:40,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565826011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:40,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:40,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 21:31:40,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261627295] [2021-06-12 21:31:40,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:40,287 INFO L87 Difference]: Start difference. First operand 189 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:40,370 INFO L93 Difference]: Finished difference Result 211 states and 810 transitions. [2021-06-12 21:31:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:31:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:40,373 INFO L225 Difference]: With dead ends: 211 [2021-06-12 21:31:40,373 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 21:31:40,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 21:31:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-06-12 21:31:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.968421052631579) internal successors, (754), 190 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-06-12 21:31:40,383 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-06-12 21:31:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:40,383 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-06-12 21:31:40,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-06-12 21:31:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:40,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:40,384 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:40,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 21:31:40,599 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-06-12 21:31:40,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:40,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53400895] [2021-06-12 21:31:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:40,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53400895] [2021-06-12 21:31:40,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53400895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410229310] [2021-06-12 21:31:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:40,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:31:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:40,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:40,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:40,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:40,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:40,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:40,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-12 21:31:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:41,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410229310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:41,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:41,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 21:31:41,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763539967] [2021-06-12 21:31:41,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:31:41,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:31:41,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:41,075 INFO L87 Difference]: Start difference. First operand 191 states and 754 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:41,207 INFO L93 Difference]: Finished difference Result 509 states and 2067 transitions. [2021-06-12 21:31:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:31:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:41,210 INFO L225 Difference]: With dead ends: 509 [2021-06-12 21:31:41,210 INFO L226 Difference]: Without dead ends: 504 [2021-06-12 21:31:41,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-12 21:31:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-06-12 21:31:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 4.37984496124031) internal successors, (1130), 258 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-06-12 21:31:41,221 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-06-12 21:31:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:41,221 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-06-12 21:31:41,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-06-12 21:31:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:41,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:41,222 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:41,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 21:31:41,437 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-06-12 21:31:41,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:41,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122465364] [2021-06-12 21:31:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:41,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:41,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122465364] [2021-06-12 21:31:41,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122465364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:41,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565870632] [2021-06-12 21:31:41,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:41,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:31:41,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:41,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565870632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:41,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:41,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 21:31:41,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526941291] [2021-06-12 21:31:41,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:41,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:41,799 INFO L87 Difference]: Start difference. First operand 259 states and 1130 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:41,937 INFO L93 Difference]: Finished difference Result 494 states and 2044 transitions. [2021-06-12 21:31:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:31:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:41,946 INFO L225 Difference]: With dead ends: 494 [2021-06-12 21:31:41,946 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 21:31:41,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 21:31:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-06-12 21:31:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 4.494736842105263) internal successors, (1281), 285 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-06-12 21:31:41,959 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-06-12 21:31:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:41,959 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-06-12 21:31:41,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-06-12 21:31:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:41,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:41,960 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:42,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 21:31:42,177 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-06-12 21:31:42,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:42,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454465953] [2021-06-12 21:31:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:42,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:42,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454465953] [2021-06-12 21:31:42,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454465953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:42,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690953462] [2021-06-12 21:31:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:42,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:42,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:42,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690953462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:42,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:42,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 21:31:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339391070] [2021-06-12 21:31:42,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:31:42,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:31:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:42,411 INFO L87 Difference]: Start difference. First operand 286 states and 1281 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:42,479 INFO L93 Difference]: Finished difference Result 345 states and 1496 transitions. [2021-06-12 21:31:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:31:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:42,482 INFO L225 Difference]: With dead ends: 345 [2021-06-12 21:31:42,482 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 21:31:42,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 21:31:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-06-12 21:31:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.505119453924915) internal successors, (1320), 293 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-06-12 21:31:42,491 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-06-12 21:31:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:42,491 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-06-12 21:31:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-06-12 21:31:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:42,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:42,493 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:42,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:42,717 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-06-12 21:31:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351578549] [2021-06-12 21:31:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:42,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351578549] [2021-06-12 21:31:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351578549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:42,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663681789] [2021-06-12 21:31:42,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:31:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:43,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:43,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:43,089 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-06-12 21:31:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:43,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663681789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:43,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:43,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 21:31:43,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489246109] [2021-06-12 21:31:43,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:43,182 INFO L87 Difference]: Start difference. First operand 294 states and 1320 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:43,366 INFO L93 Difference]: Finished difference Result 411 states and 1659 transitions. [2021-06-12 21:31:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:43,369 INFO L225 Difference]: With dead ends: 411 [2021-06-12 21:31:43,369 INFO L226 Difference]: Without dead ends: 397 [2021-06-12 21:31:43,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-12 21:31:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-06-12 21:31:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 321 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-06-12 21:31:43,379 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-06-12 21:31:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:43,379 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-06-12 21:31:43,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-06-12 21:31:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:43,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:43,381 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:43,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:31:43,597 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-06-12 21:31:43,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:43,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428622558] [2021-06-12 21:31:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:43,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:43,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428622558] [2021-06-12 21:31:43,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428622558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:43,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630746495] [2021-06-12 21:31:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:43,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:31:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:43,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:43,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:43,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:43,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-12 21:31:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:44,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630746495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:44,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:44,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:31:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072934826] [2021-06-12 21:31:44,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:44,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:44,036 INFO L87 Difference]: Start difference. First operand 322 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:44,324 INFO L93 Difference]: Finished difference Result 868 states and 3551 transitions. [2021-06-12 21:31:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:31:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:44,329 INFO L225 Difference]: With dead ends: 868 [2021-06-12 21:31:44,329 INFO L226 Difference]: Without dead ends: 841 [2021-06-12 21:31:44,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:31:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-12 21:31:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-06-12 21:31:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.545893719806763) internal successors, (1882), 414 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-06-12 21:31:44,347 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-06-12 21:31:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:44,347 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-06-12 21:31:44,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-06-12 21:31:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:44,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:44,349 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:44,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 21:31:44,572 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-06-12 21:31:44,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:44,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552178444] [2021-06-12 21:31:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:44,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552178444] [2021-06-12 21:31:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552178444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:44,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55683298] [2021-06-12 21:31:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:44,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:31:44,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:44,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55683298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:44,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:44,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 21:31:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997038396] [2021-06-12 21:31:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:44,905 INFO L87 Difference]: Start difference. First operand 415 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:44,969 INFO L93 Difference]: Finished difference Result 431 states and 1910 transitions. [2021-06-12 21:31:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:44,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:44,972 INFO L225 Difference]: With dead ends: 431 [2021-06-12 21:31:44,972 INFO L226 Difference]: Without dead ends: 429 [2021-06-12 21:31:44,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-12 21:31:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-06-12 21:31:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.531400966183575) internal successors, (1876), 414 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-06-12 21:31:44,982 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-06-12 21:31:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:44,983 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-06-12 21:31:44,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-06-12 21:31:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:44,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:44,984 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:45,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:45,207 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-06-12 21:31:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:45,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151681282] [2021-06-12 21:31:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:45,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:45,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151681282] [2021-06-12 21:31:45,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151681282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:45,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443178572] [2021-06-12 21:31:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:45,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:31:45,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:45,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443178572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:45,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:45,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 21:31:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428453530] [2021-06-12 21:31:45,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:45,599 INFO L87 Difference]: Start difference. First operand 415 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:45,753 INFO L93 Difference]: Finished difference Result 1022 states and 4384 transitions. [2021-06-12 21:31:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:31:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:45,759 INFO L225 Difference]: With dead ends: 1022 [2021-06-12 21:31:45,759 INFO L226 Difference]: Without dead ends: 1006 [2021-06-12 21:31:45,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-12 21:31:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-06-12 21:31:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 4.792048929663609) internal successors, (3134), 654 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-06-12 21:31:45,780 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-06-12 21:31:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:45,780 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-06-12 21:31:45,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-06-12 21:31:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:45,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:45,782 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:45,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 21:31:45,997 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-06-12 21:31:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:45,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699875856] [2021-06-12 21:31:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:46,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:46,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699875856] [2021-06-12 21:31:46,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699875856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:46,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230138428] [2021-06-12 21:31:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:46,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:46,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:31:46,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:46,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230138428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:46,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:46,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 21:31:46,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459906599] [2021-06-12 21:31:46,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:31:46,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:46,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:31:46,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:46,345 INFO L87 Difference]: Start difference. First operand 655 states and 3134 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:46,462 INFO L93 Difference]: Finished difference Result 715 states and 3326 transitions. [2021-06-12 21:31:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:46,467 INFO L225 Difference]: With dead ends: 715 [2021-06-12 21:31:46,467 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 21:31:46,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 21:31:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-06-12 21:31:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-12 21:31:46,486 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-12 21:31:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:46,488 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-12 21:31:46,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-12 21:31:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:46,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:46,490 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:46,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 21:31:46,705 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-06-12 21:31:46,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:46,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278803786] [2021-06-12 21:31:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:46,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:46,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278803786] [2021-06-12 21:31:46,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278803786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:46,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911260091] [2021-06-12 21:31:46,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:46,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:46,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:46,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:46,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:46,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:46,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-12 21:31:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911260091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:47,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:47,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 21:31:47,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534855671] [2021-06-12 21:31:47,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:47,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:47,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:47,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:47,015 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:47,127 INFO L93 Difference]: Finished difference Result 745 states and 3433 transitions. [2021-06-12 21:31:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:31:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:47,131 INFO L225 Difference]: With dead ends: 745 [2021-06-12 21:31:47,131 INFO L226 Difference]: Without dead ends: 740 [2021-06-12 21:31:47,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-12 21:31:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-06-12 21:31:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-12 21:31:47,149 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-12 21:31:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:47,149 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-12 21:31:47,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-12 21:31:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:47,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:47,151 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:47,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 21:31:47,365 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-06-12 21:31:47,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:47,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558949982] [2021-06-12 21:31:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:47,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:47,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558949982] [2021-06-12 21:31:47,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558949982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:47,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046213866] [2021-06-12 21:31:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:47,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046213866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:47,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:47,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 21:31:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136311155] [2021-06-12 21:31:47,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:31:47,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:31:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:47,735 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:47,945 INFO L93 Difference]: Finished difference Result 706 states and 3296 transitions. [2021-06-12 21:31:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:31:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:47,949 INFO L225 Difference]: With dead ends: 706 [2021-06-12 21:31:47,950 INFO L226 Difference]: Without dead ends: 704 [2021-06-12 21:31:47,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:31:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-12 21:31:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-06-12 21:31:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 4.774436090225564) internal successors, (3175), 665 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-06-12 21:31:47,966 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-06-12 21:31:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:47,967 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-06-12 21:31:47,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-06-12 21:31:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:47,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:47,969 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:48,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 21:31:48,191 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-06-12 21:31:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:48,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341691783] [2021-06-12 21:31:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:48,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:48,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341691783] [2021-06-12 21:31:48,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341691783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:48,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984388854] [2021-06-12 21:31:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:48,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:31:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:31:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984388854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:48,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:48,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 21:31:48,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941950805] [2021-06-12 21:31:48,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:48,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:48,485 INFO L87 Difference]: Start difference. First operand 666 states and 3175 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:48,734 INFO L93 Difference]: Finished difference Result 1302 states and 5669 transitions. [2021-06-12 21:31:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:31:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:48,740 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 21:31:48,740 INFO L226 Difference]: Without dead ends: 1272 [2021-06-12 21:31:48,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:31:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-12 21:31:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-06-12 21:31:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 4.794836956521739) internal successors, (3529), 736 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-06-12 21:31:48,764 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-06-12 21:31:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:48,764 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-06-12 21:31:48,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-06-12 21:31:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:48,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:48,766 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:48,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:48,985 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-06-12 21:31:48,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:48,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213995957] [2021-06-12 21:31:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:49,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213995957] [2021-06-12 21:31:49,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213995957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42450823] [2021-06-12 21:31:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:49,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:49,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42450823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:49,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:49,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-12 21:31:49,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77673052] [2021-06-12 21:31:49,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:49,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:49,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:49,430 INFO L87 Difference]: Start difference. First operand 737 states and 3529 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:49,760 INFO L93 Difference]: Finished difference Result 910 states and 3945 transitions. [2021-06-12 21:31:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:31:49,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:31:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:49,766 INFO L225 Difference]: With dead ends: 910 [2021-06-12 21:31:49,766 INFO L226 Difference]: Without dead ends: 881 [2021-06-12 21:31:49,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-12 21:31:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-06-12 21:31:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 4.806020066889632) internal successors, (2874), 598 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-06-12 21:31:49,784 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-06-12 21:31:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:49,784 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-06-12 21:31:49,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-06-12 21:31:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:49,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:49,786 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:50,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 21:31:50,001 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:50,001 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-06-12 21:31:50,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:50,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321685828] [2021-06-12 21:31:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321685828] [2021-06-12 21:31:50,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321685828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442006731] [2021-06-12 21:31:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:50,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:31:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:31:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442006731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:50,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:50,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:50,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498892453] [2021-06-12 21:31:50,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:50,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:50,409 INFO L87 Difference]: Start difference. First operand 599 states and 2874 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:50,612 INFO L93 Difference]: Finished difference Result 792 states and 3525 transitions. [2021-06-12 21:31:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:31:50,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:50,615 INFO L225 Difference]: With dead ends: 792 [2021-06-12 21:31:50,615 INFO L226 Difference]: Without dead ends: 762 [2021-06-12 21:31:50,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:31:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-12 21:31:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-12 21:31:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 4.821192052980132) internal successors, (2912), 604 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-06-12 21:31:50,631 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-06-12 21:31:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:50,631 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-06-12 21:31:50,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-06-12 21:31:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:50,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:50,633 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:50,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:50,849 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-06-12 21:31:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:50,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395708088] [2021-06-12 21:31:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395708088] [2021-06-12 21:31:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395708088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047217486] [2021-06-12 21:31:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:50,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:50,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:51,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:51,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:51,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:51,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:51,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:51,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:31:51,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-06-12 21:31:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047217486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:51,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:51,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 21:31:51,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883309920] [2021-06-12 21:31:51,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:31:51,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:31:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:51,289 INFO L87 Difference]: Start difference. First operand 605 states and 2912 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:51,536 INFO L93 Difference]: Finished difference Result 1203 states and 5352 transitions. [2021-06-12 21:31:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:31:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:51,544 INFO L225 Difference]: With dead ends: 1203 [2021-06-12 21:31:51,544 INFO L226 Difference]: Without dead ends: 1179 [2021-06-12 21:31:51,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:31:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-12 21:31:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-06-12 21:31:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.96025641025641) internal successors, (3869), 780 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-06-12 21:31:51,567 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-06-12 21:31:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:51,567 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-06-12 21:31:51,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-06-12 21:31:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:51,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:51,570 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:51,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 21:31:51,785 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-06-12 21:31:51,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:51,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125323944] [2021-06-12 21:31:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125323944] [2021-06-12 21:31:51,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125323944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676749651] [2021-06-12 21:31:51,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:51,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:31:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676749651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:52,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:52,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913291419] [2021-06-12 21:31:52,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:52,295 INFO L87 Difference]: Start difference. First operand 781 states and 3869 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:52,677 INFO L93 Difference]: Finished difference Result 869 states and 4146 transitions. [2021-06-12 21:31:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:31:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:52,684 INFO L225 Difference]: With dead ends: 869 [2021-06-12 21:31:52,685 INFO L226 Difference]: Without dead ends: 864 [2021-06-12 21:31:52,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:31:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-12 21:31:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-06-12 21:31:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 4.963197969543147) internal successors, (3911), 788 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-06-12 21:31:52,708 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-06-12 21:31:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:52,709 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-06-12 21:31:52,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-06-12 21:31:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:52,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:52,712 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 21:31:52,936 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-06-12 21:31:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426878504] [2021-06-12 21:31:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:53,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426878504] [2021-06-12 21:31:53,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426878504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:53,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489515190] [2021-06-12 21:31:53,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:53,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:31:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:53,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:53,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:53,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:53,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:53,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-12 21:31:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489515190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:53,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:53,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:31:53,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495837195] [2021-06-12 21:31:53,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:31:53,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:31:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:53,363 INFO L87 Difference]: Start difference. First operand 789 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:53,625 INFO L93 Difference]: Finished difference Result 1170 states and 5326 transitions. [2021-06-12 21:31:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:31:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:53,629 INFO L225 Difference]: With dead ends: 1170 [2021-06-12 21:31:53,630 INFO L226 Difference]: Without dead ends: 1162 [2021-06-12 21:31:53,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:31:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-12 21:31:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-06-12 21:31:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.951732673267327) internal successors, (4001), 808 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-06-12 21:31:53,653 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-06-12 21:31:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:53,653 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-06-12 21:31:53,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-06-12 21:31:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:53,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:53,656 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 21:31:53,869 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-06-12 21:31:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468964145] [2021-06-12 21:31:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:54,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468964145] [2021-06-12 21:31:54,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468964145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886271779] [2021-06-12 21:31:54,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:54,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:54,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:54,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:54,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:54,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:54,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:31:54,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-06-12 21:31:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:54,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886271779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:54,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:54,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-12 21:31:54,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057040465] [2021-06-12 21:31:54,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:31:54,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:31:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:54,299 INFO L87 Difference]: Start difference. First operand 809 states and 4001 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:54,398 INFO L93 Difference]: Finished difference Result 958 states and 4478 transitions. [2021-06-12 21:31:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:31:54,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:54,401 INFO L225 Difference]: With dead ends: 958 [2021-06-12 21:31:54,401 INFO L226 Difference]: Without dead ends: 943 [2021-06-12 21:31:54,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:31:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-12 21:31:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-06-12 21:31:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 4.922794117647059) internal successors, (4017), 816 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-06-12 21:31:54,422 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-06-12 21:31:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:54,422 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-06-12 21:31:54,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-06-12 21:31:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:54,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:54,424 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:54,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:54,638 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:54,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-06-12 21:31:54,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:54,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441399859] [2021-06-12 21:31:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:54,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441399859] [2021-06-12 21:31:54,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441399859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561507057] [2021-06-12 21:31:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:54,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:54,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:31:54,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561507057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88256371] [2021-06-12 21:31:55,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:55,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:55,040 INFO L87 Difference]: Start difference. First operand 817 states and 4017 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:55,336 INFO L93 Difference]: Finished difference Result 1066 states and 4874 transitions. [2021-06-12 21:31:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:31:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:55,340 INFO L225 Difference]: With dead ends: 1066 [2021-06-12 21:31:55,340 INFO L226 Difference]: Without dead ends: 1039 [2021-06-12 21:31:55,342 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:31:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-12 21:31:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-06-12 21:31:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 4.927033492822966) internal successors, (4119), 836 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-06-12 21:31:55,362 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-06-12 21:31:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:55,362 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-06-12 21:31:55,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-06-12 21:31:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:55,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:55,365 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:55,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 21:31:55,581 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:55,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-06-12 21:31:55,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:55,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218928575] [2021-06-12 21:31:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218928575] [2021-06-12 21:31:55,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218928575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122320110] [2021-06-12 21:31:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:55,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:31:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:31:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122320110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:55,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:55,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840003030] [2021-06-12 21:31:55,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:55,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:55,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:55,929 INFO L87 Difference]: Start difference. First operand 837 states and 4119 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:56,068 INFO L93 Difference]: Finished difference Result 896 states and 4308 transitions. [2021-06-12 21:31:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:56,071 INFO L225 Difference]: With dead ends: 896 [2021-06-12 21:31:56,071 INFO L226 Difference]: Without dead ends: 891 [2021-06-12 21:31:56,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:31:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-12 21:31:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-06-12 21:31:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 4.915576694411415) internal successors, (4134), 841 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-06-12 21:31:56,088 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-06-12 21:31:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:56,088 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-06-12 21:31:56,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-06-12 21:31:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:56,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:56,091 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:56,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:56,306 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-06-12 21:31:56,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:56,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406727985] [2021-06-12 21:31:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:56,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406727985] [2021-06-12 21:31:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406727985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994747380] [2021-06-12 21:31:56,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:56,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:31:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:56,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:56,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:56,903 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-06-12 21:31:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:56,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:56,928 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-06-12 21:31:56,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:56,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-06-12 21:31:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:56,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994747380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:56,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:56,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045959222] [2021-06-12 21:31:56,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:56,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:56,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:56,963 INFO L87 Difference]: Start difference. First operand 842 states and 4134 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:57,301 INFO L93 Difference]: Finished difference Result 947 states and 4449 transitions. [2021-06-12 21:31:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:31:57,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:57,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:57,304 INFO L225 Difference]: With dead ends: 947 [2021-06-12 21:31:57,304 INFO L226 Difference]: Without dead ends: 930 [2021-06-12 21:31:57,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:31:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-12 21:31:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-06-12 21:31:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 4.914893617021277) internal successors, (4158), 846 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-06-12 21:31:57,321 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-06-12 21:31:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:57,321 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-06-12 21:31:57,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-06-12 21:31:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:57,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:57,323 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:57,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:57,547 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:57,547 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-06-12 21:31:57,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:57,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828632589] [2021-06-12 21:31:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:57,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:57,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828632589] [2021-06-12 21:31:57,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828632589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909996500] [2021-06-12 21:31:57,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:57,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:31:57,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:31:57,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:57,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:31:57,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:57,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:57,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:57,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-12 21:31:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:57,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909996500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:57,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:31:57,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277998165] [2021-06-12 21:31:57,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:57,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:57,810 INFO L87 Difference]: Start difference. First operand 847 states and 4158 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:58,012 INFO L93 Difference]: Finished difference Result 1380 states and 6250 transitions. [2021-06-12 21:31:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:31:58,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:58,017 INFO L225 Difference]: With dead ends: 1380 [2021-06-12 21:31:58,017 INFO L226 Difference]: Without dead ends: 1371 [2021-06-12 21:31:58,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-12 21:31:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-06-12 21:31:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.988901220865705) internal successors, (4495), 901 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-06-12 21:31:58,041 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-06-12 21:31:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:58,041 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-06-12 21:31:58,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-06-12 21:31:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:58,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:58,045 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:58,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 21:31:58,261 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-06-12 21:31:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:58,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373696780] [2021-06-12 21:31:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:58,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:58,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373696780] [2021-06-12 21:31:58,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373696780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:58,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250011668] [2021-06-12 21:31:58,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:58,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:58,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:31:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250011668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:58,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:58,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:31:58,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969073746] [2021-06-12 21:31:58,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:31:58,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:31:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:58,763 INFO L87 Difference]: Start difference. First operand 902 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:59,058 INFO L93 Difference]: Finished difference Result 929 states and 4570 transitions. [2021-06-12 21:31:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:31:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:31:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:59,062 INFO L225 Difference]: With dead ends: 929 [2021-06-12 21:31:59,062 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 21:31:59,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:31:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 21:31:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-06-12 21:31:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.973568281938326) internal successors, (4516), 908 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-06-12 21:31:59,082 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-06-12 21:31:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:59,082 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-06-12 21:31:59,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-06-12 21:31:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:59,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:59,085 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:59,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:59,308 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-06-12 21:31:59,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:59,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191979778] [2021-06-12 21:31:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191979778] [2021-06-12 21:31:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191979778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875402997] [2021-06-12 21:31:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:59,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:31:59,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:31:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875402997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:59,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:59,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 21:31:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823172836] [2021-06-12 21:31:59,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:59,933 INFO L87 Difference]: Start difference. First operand 909 states and 4516 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:00,333 INFO L93 Difference]: Finished difference Result 936 states and 4581 transitions. [2021-06-12 21:32:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:32:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:00,337 INFO L225 Difference]: With dead ends: 936 [2021-06-12 21:32:00,337 INFO L226 Difference]: Without dead ends: 934 [2021-06-12 21:32:00,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-12 21:32:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-06-12 21:32:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.970198675496689) internal successors, (4503), 906 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-06-12 21:32:00,360 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-06-12 21:32:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:00,361 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-06-12 21:32:00,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-06-12 21:32:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:32:00,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:00,364 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:00,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:32:00,587 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:00,587 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-06-12 21:32:00,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:00,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014688017] [2021-06-12 21:32:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:00,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014688017] [2021-06-12 21:32:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014688017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308834470] [2021-06-12 21:32:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:00,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:00,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:01,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308834470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:01,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:01,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:32:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741287997] [2021-06-12 21:32:01,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:01,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:01,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:01,189 INFO L87 Difference]: Start difference. First operand 907 states and 4503 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:01,423 INFO L93 Difference]: Finished difference Result 929 states and 4558 transitions. [2021-06-12 21:32:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:32:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:32:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:01,425 INFO L225 Difference]: With dead ends: 929 [2021-06-12 21:32:01,425 INFO L226 Difference]: Without dead ends: 928 [2021-06-12 21:32:01,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-12 21:32:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-06-12 21:32:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 4.965821389195149) internal successors, (4504), 907 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-06-12 21:32:01,446 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-06-12 21:32:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:01,446 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-06-12 21:32:01,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-06-12 21:32:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:01,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:01,449 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:01,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:01,665 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-06-12 21:32:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:01,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442759236] [2021-06-12 21:32:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:01,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:01,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442759236] [2021-06-12 21:32:01,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442759236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:01,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630658598] [2021-06-12 21:32:01,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:32:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:02,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630658598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:02,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:02,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:32:02,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494467576] [2021-06-12 21:32:02,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:02,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:02,225 INFO L87 Difference]: Start difference. First operand 908 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:02,468 INFO L93 Difference]: Finished difference Result 952 states and 4606 transitions. [2021-06-12 21:32:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:02,470 INFO L225 Difference]: With dead ends: 952 [2021-06-12 21:32:02,470 INFO L226 Difference]: Without dead ends: 950 [2021-06-12 21:32:02,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-12 21:32:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-06-12 21:32:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.942541436464088) internal successors, (4473), 905 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-06-12 21:32:02,486 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-06-12 21:32:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:02,486 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-06-12 21:32:02,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-06-12 21:32:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:02,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:02,488 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:02,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 21:32:02,691 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-06-12 21:32:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:02,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217883167] [2021-06-12 21:32:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:02,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:02,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217883167] [2021-06-12 21:32:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217883167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:02,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818403360] [2021-06-12 21:32:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:02,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:03,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:03,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:03,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:03,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:03,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:03,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:32:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:03,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818403360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:03,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:03,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:32:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814929217] [2021-06-12 21:32:03,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:03,248 INFO L87 Difference]: Start difference. First operand 906 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:03,322 INFO L93 Difference]: Finished difference Result 1075 states and 4663 transitions. [2021-06-12 21:32:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:03,324 INFO L225 Difference]: With dead ends: 1075 [2021-06-12 21:32:03,324 INFO L226 Difference]: Without dead ends: 1071 [2021-06-12 21:32:03,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-12 21:32:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-06-12 21:32:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 4.752269779507134) internal successors, (3664), 771 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-06-12 21:32:03,337 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-06-12 21:32:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:03,337 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-06-12 21:32:03,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-06-12 21:32:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:03,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:03,339 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:03,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:03,541 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-06-12 21:32:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344169044] [2021-06-12 21:32:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:03,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:03,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344169044] [2021-06-12 21:32:03,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344169044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:03,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910402705] [2021-06-12 21:32:03,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:03,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:32:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:03,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910402705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:03,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:03,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:32:03,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406553732] [2021-06-12 21:32:03,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:03,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:03,952 INFO L87 Difference]: Start difference. First operand 772 states and 3664 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:04,072 INFO L93 Difference]: Finished difference Result 833 states and 3832 transitions. [2021-06-12 21:32:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:04,074 INFO L225 Difference]: With dead ends: 833 [2021-06-12 21:32:04,074 INFO L226 Difference]: Without dead ends: 827 [2021-06-12 21:32:04,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-12 21:32:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-06-12 21:32:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.745148771021992) internal successors, (3668), 773 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-06-12 21:32:04,090 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-06-12 21:32:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:04,090 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-06-12 21:32:04,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-06-12 21:32:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:04,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:04,092 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:04,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:04,305 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-06-12 21:32:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:04,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093457669] [2021-06-12 21:32:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:04,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093457669] [2021-06-12 21:32:04,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093457669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191731080] [2021-06-12 21:32:04,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:04,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:04,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191731080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:04,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:04,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:32:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345288750] [2021-06-12 21:32:04,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:04,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:04,847 INFO L87 Difference]: Start difference. First operand 774 states and 3668 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:04,957 INFO L93 Difference]: Finished difference Result 830 states and 3817 transitions. [2021-06-12 21:32:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:04,959 INFO L225 Difference]: With dead ends: 830 [2021-06-12 21:32:04,959 INFO L226 Difference]: Without dead ends: 828 [2021-06-12 21:32:04,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-12 21:32:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-06-12 21:32:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 4.736774193548387) internal successors, (3671), 775 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-06-12 21:32:04,971 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-06-12 21:32:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:04,971 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-06-12 21:32:04,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-06-12 21:32:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:04,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:04,973 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:05,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:05,174 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-06-12 21:32:05,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:05,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037460867] [2021-06-12 21:32:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:32:05,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:05,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037460867] [2021-06-12 21:32:05,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037460867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:05,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142461005] [2021-06-12 21:32:05,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:32:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142461005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:05,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:05,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 21:32:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775257559] [2021-06-12 21:32:05,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:05,684 INFO L87 Difference]: Start difference. First operand 776 states and 3671 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:05,860 INFO L93 Difference]: Finished difference Result 941 states and 4147 transitions. [2021-06-12 21:32:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:05,862 INFO L225 Difference]: With dead ends: 941 [2021-06-12 21:32:05,862 INFO L226 Difference]: Without dead ends: 923 [2021-06-12 21:32:05,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-12 21:32:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-06-12 21:32:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.699481865284974) internal successors, (3628), 772 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-06-12 21:32:05,874 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-06-12 21:32:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:05,874 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-06-12 21:32:05,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-06-12 21:32:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:05,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:05,875 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:06,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:06,096 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-06-12 21:32:06,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:06,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774552965] [2021-06-12 21:32:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:06,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:06,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774552965] [2021-06-12 21:32:06,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774552965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:06,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732788706] [2021-06-12 21:32:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:06,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:32:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:06,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732788706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:06,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:06,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:32:06,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868532551] [2021-06-12 21:32:06,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:06,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:06,656 INFO L87 Difference]: Start difference. First operand 773 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:06,848 INFO L93 Difference]: Finished difference Result 828 states and 3794 transitions. [2021-06-12 21:32:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:06,850 INFO L225 Difference]: With dead ends: 828 [2021-06-12 21:32:06,850 INFO L226 Difference]: Without dead ends: 825 [2021-06-12 21:32:06,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:32:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-12 21:32:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-06-12 21:32:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 4.694587628865979) internal successors, (3643), 776 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-06-12 21:32:06,862 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-06-12 21:32:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:06,863 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-06-12 21:32:06,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-06-12 21:32:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:06,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:06,865 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:07,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 21:32:07,081 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-06-12 21:32:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:07,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243836154] [2021-06-12 21:32:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:07,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243836154] [2021-06-12 21:32:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243836154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701329677] [2021-06-12 21:32:07,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:07,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:07,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:07,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:07,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:07,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:07,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:07,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:07,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:32:07,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-06-12 21:32:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:32:07,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701329677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:07,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:07,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 21:32:07,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567374046] [2021-06-12 21:32:07,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:07,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:07,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:07,397 INFO L87 Difference]: Start difference. First operand 777 states and 3643 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:07,774 INFO L93 Difference]: Finished difference Result 867 states and 3843 transitions. [2021-06-12 21:32:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:32:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:07,776 INFO L225 Difference]: With dead ends: 867 [2021-06-12 21:32:07,776 INFO L226 Difference]: Without dead ends: 861 [2021-06-12 21:32:07,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-12 21:32:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-06-12 21:32:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.66010498687664) internal successors, (3551), 762 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-06-12 21:32:07,788 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-06-12 21:32:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:07,788 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-06-12 21:32:07,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-06-12 21:32:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:07,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:07,789 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:07,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:07,990 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-06-12 21:32:07,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:07,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115783749] [2021-06-12 21:32:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:08,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115783749] [2021-06-12 21:32:08,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115783749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531007879] [2021-06-12 21:32:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:32:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:08,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:08,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:08,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:08,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:08,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-06-12 21:32:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:08,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531007879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:08,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:08,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 21:32:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380776405] [2021-06-12 21:32:08,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:32:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:32:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:32:08,374 INFO L87 Difference]: Start difference. First operand 763 states and 3551 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:08,652 INFO L93 Difference]: Finished difference Result 2342 states and 10200 transitions. [2021-06-12 21:32:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:08,659 INFO L225 Difference]: With dead ends: 2342 [2021-06-12 21:32:08,659 INFO L226 Difference]: Without dead ends: 2230 [2021-06-12 21:32:08,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-12 21:32:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-06-12 21:32:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.92466296590008) internal successors, (6210), 1261 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-06-12 21:32:08,704 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-06-12 21:32:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:08,705 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-06-12 21:32:08,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-06-12 21:32:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:08,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:08,708 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:08,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:08,921 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-06-12 21:32:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:08,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946402277] [2021-06-12 21:32:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:09,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:09,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946402277] [2021-06-12 21:32:09,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946402277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:09,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332973980] [2021-06-12 21:32:09,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:09,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:09,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:09,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:09,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:09,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:09,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:09,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332973980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:09,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:09,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065962863] [2021-06-12 21:32:09,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:09,590 INFO L87 Difference]: Start difference. First operand 1262 states and 6210 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:10,156 INFO L93 Difference]: Finished difference Result 1627 states and 7436 transitions. [2021-06-12 21:32:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:10,160 INFO L225 Difference]: With dead ends: 1627 [2021-06-12 21:32:10,160 INFO L226 Difference]: Without dead ends: 1589 [2021-06-12 21:32:10,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-12 21:32:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-06-12 21:32:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.918667699457784) internal successors, (6350), 1291 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-06-12 21:32:10,182 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-06-12 21:32:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:10,182 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-06-12 21:32:10,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-06-12 21:32:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:10,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:10,185 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:10,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 21:32:10,393 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-06-12 21:32:10,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:10,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306039452] [2021-06-12 21:32:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:10,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306039452] [2021-06-12 21:32:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306039452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957473196] [2021-06-12 21:32:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:10,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:32:10,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:10,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:10,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:10,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:10,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:10,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 21:32:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:10,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957473196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:10,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:10,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:10,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939920690] [2021-06-12 21:32:10,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:10,820 INFO L87 Difference]: Start difference. First operand 1292 states and 6350 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:11,125 INFO L93 Difference]: Finished difference Result 2364 states and 10664 transitions. [2021-06-12 21:32:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:32:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:11,132 INFO L225 Difference]: With dead ends: 2364 [2021-06-12 21:32:11,132 INFO L226 Difference]: Without dead ends: 2284 [2021-06-12 21:32:11,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-12 21:32:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-06-12 21:32:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 5.044398907103825) internal successors, (7385), 1464 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-06-12 21:32:11,169 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-06-12 21:32:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:11,169 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-06-12 21:32:11,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-06-12 21:32:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:11,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:11,173 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:11,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 21:32:11,396 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:11,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-06-12 21:32:11,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:11,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343111045] [2021-06-12 21:32:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:11,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343111045] [2021-06-12 21:32:11,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343111045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319092400] [2021-06-12 21:32:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:11,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:11,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:32:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:11,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:11,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:11,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:11,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:11,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-06-12 21:32:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:11,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319092400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:11,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:11,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-12 21:32:11,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9199040] [2021-06-12 21:32:11,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:11,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:11,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:11,731 INFO L87 Difference]: Start difference. First operand 1465 states and 7385 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:11,999 INFO L93 Difference]: Finished difference Result 2052 states and 9700 transitions. [2021-06-12 21:32:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:12,004 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 21:32:12,004 INFO L226 Difference]: Without dead ends: 2019 [2021-06-12 21:32:12,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-12 21:32:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-06-12 21:32:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 5.078964830789649) internal successors, (7654), 1507 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-06-12 21:32:12,033 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-06-12 21:32:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:12,033 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-06-12 21:32:12,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-06-12 21:32:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:12,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:12,037 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:12,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 21:32:12,245 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-06-12 21:32:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:12,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811576523] [2021-06-12 21:32:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:12,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:12,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811576523] [2021-06-12 21:32:12,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811576523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:12,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75086702] [2021-06-12 21:32:12,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:12,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:12,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75086702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:12,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:12,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:32:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143096493] [2021-06-12 21:32:12,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:12,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:12,578 INFO L87 Difference]: Start difference. First operand 1508 states and 7654 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:12,740 INFO L93 Difference]: Finished difference Result 2203 states and 10357 transitions. [2021-06-12 21:32:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:12,744 INFO L225 Difference]: With dead ends: 2203 [2021-06-12 21:32:12,744 INFO L226 Difference]: Without dead ends: 2160 [2021-06-12 21:32:12,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-12 21:32:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-06-12 21:32:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 5.1066302118933695) internal successors, (7471), 1463 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-06-12 21:32:12,782 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-06-12 21:32:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:12,782 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-06-12 21:32:12,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-06-12 21:32:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:12,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:12,785 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:12,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:12,986 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:12,986 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-06-12 21:32:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:12,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880206835] [2021-06-12 21:32:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:13,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880206835] [2021-06-12 21:32:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880206835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935019812] [2021-06-12 21:32:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:13,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:13,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:13,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935019812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:13,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:13,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160527511] [2021-06-12 21:32:13,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:13,525 INFO L87 Difference]: Start difference. First operand 1464 states and 7471 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:13,790 INFO L93 Difference]: Finished difference Result 1548 states and 7764 transitions. [2021-06-12 21:32:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:13,795 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 21:32:13,795 INFO L226 Difference]: Without dead ends: 1536 [2021-06-12 21:32:13,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-12 21:32:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-06-12 21:32:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 5.104548540393754) internal successors, (7519), 1473 states have internal predecessors, (7519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-06-12 21:32:13,824 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-06-12 21:32:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:13,824 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-06-12 21:32:13,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-06-12 21:32:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:13,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:13,828 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:14,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 21:32:14,041 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-06-12 21:32:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:14,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987327625] [2021-06-12 21:32:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:14,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987327625] [2021-06-12 21:32:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987327625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158223281] [2021-06-12 21:32:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:14,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158223281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:14,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:14,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:14,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153759622] [2021-06-12 21:32:14,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:14,713 INFO L87 Difference]: Start difference. First operand 1474 states and 7519 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:14,968 INFO L93 Difference]: Finished difference Result 1546 states and 7729 transitions. [2021-06-12 21:32:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:14,971 INFO L225 Difference]: With dead ends: 1546 [2021-06-12 21:32:14,971 INFO L226 Difference]: Without dead ends: 1534 [2021-06-12 21:32:14,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-12 21:32:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-06-12 21:32:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 5.102581521739131) internal successors, (7511), 1472 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-06-12 21:32:14,991 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-06-12 21:32:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:14,991 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-06-12 21:32:14,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-06-12 21:32:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:14,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:14,993 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:15,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 21:32:15,194 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-06-12 21:32:15,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:15,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739448813] [2021-06-12 21:32:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:15,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:15,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739448813] [2021-06-12 21:32:15,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739448813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:15,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382787487] [2021-06-12 21:32:15,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:15,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:15,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382787487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:15,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:15,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095714245] [2021-06-12 21:32:15,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:15,571 INFO L87 Difference]: Start difference. First operand 1473 states and 7511 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:15,764 INFO L93 Difference]: Finished difference Result 1593 states and 7901 transitions. [2021-06-12 21:32:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:15,767 INFO L225 Difference]: With dead ends: 1593 [2021-06-12 21:32:15,767 INFO L226 Difference]: Without dead ends: 1586 [2021-06-12 21:32:15,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-12 21:32:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-06-12 21:32:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 5.092991913746631) internal successors, (7558), 1484 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-06-12 21:32:15,792 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-06-12 21:32:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:15,792 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-06-12 21:32:15,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-06-12 21:32:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:15,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:15,795 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:16,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:16,001 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-06-12 21:32:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563159190] [2021-06-12 21:32:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:16,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563159190] [2021-06-12 21:32:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563159190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737784760] [2021-06-12 21:32:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:16,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:32:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737784760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183578790] [2021-06-12 21:32:16,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:16,439 INFO L87 Difference]: Start difference. First operand 1485 states and 7558 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:16,619 INFO L93 Difference]: Finished difference Result 1522 states and 7682 transitions. [2021-06-12 21:32:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:16,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:16,622 INFO L225 Difference]: With dead ends: 1522 [2021-06-12 21:32:16,622 INFO L226 Difference]: Without dead ends: 1517 [2021-06-12 21:32:16,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-06-12 21:32:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-06-12 21:32:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.088156123822342) internal successors, (7561), 1486 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-06-12 21:32:16,642 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-06-12 21:32:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:16,642 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-06-12 21:32:16,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-06-12 21:32:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:16,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:16,645 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:16,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 21:32:16,845 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-06-12 21:32:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:16,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765662749] [2021-06-12 21:32:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:16,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:16,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765662749] [2021-06-12 21:32:16,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765662749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:16,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825807532] [2021-06-12 21:32:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:17,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:17,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:17,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825807532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:17,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:17,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:17,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156430068] [2021-06-12 21:32:17,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:17,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:17,444 INFO L87 Difference]: Start difference. First operand 1487 states and 7561 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:17,687 INFO L93 Difference]: Finished difference Result 1542 states and 7723 transitions. [2021-06-12 21:32:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:17,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:17,690 INFO L225 Difference]: With dead ends: 1542 [2021-06-12 21:32:17,690 INFO L226 Difference]: Without dead ends: 1535 [2021-06-12 21:32:17,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-12 21:32:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-06-12 21:32:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.090847913862719) internal successors, (7565), 1486 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-06-12 21:32:17,711 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-06-12 21:32:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-06-12 21:32:17,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-06-12 21:32:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:17,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:17,715 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:17,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 21:32:17,915 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-06-12 21:32:17,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139014163] [2021-06-12 21:32:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:18,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:18,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139014163] [2021-06-12 21:32:18,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139014163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:18,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401641324] [2021-06-12 21:32:18,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:18,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:18,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:18,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:18,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:18,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:18,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401641324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:18,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:18,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:18,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621758724] [2021-06-12 21:32:18,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:18,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:18,420 INFO L87 Difference]: Start difference. First operand 1487 states and 7565 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:18,706 INFO L93 Difference]: Finished difference Result 2082 states and 9859 transitions. [2021-06-12 21:32:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:32:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:18,711 INFO L225 Difference]: With dead ends: 2082 [2021-06-12 21:32:18,711 INFO L226 Difference]: Without dead ends: 2041 [2021-06-12 21:32:18,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 419.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-12 21:32:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-06-12 21:32:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 5.153279785809906) internal successors, (7699), 1494 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-06-12 21:32:18,744 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-06-12 21:32:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:18,744 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-06-12 21:32:18,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-06-12 21:32:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:18,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:18,748 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:18,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 21:32:18,961 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-06-12 21:32:18,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:18,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580877763] [2021-06-12 21:32:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:19,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580877763] [2021-06-12 21:32:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580877763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486593471] [2021-06-12 21:32:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:19,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:19,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486593471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:19,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:19,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:19,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854943634] [2021-06-12 21:32:19,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:19,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:19,598 INFO L87 Difference]: Start difference. First operand 1495 states and 7699 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:19,930 INFO L93 Difference]: Finished difference Result 1873 states and 8862 transitions. [2021-06-12 21:32:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:32:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:19,934 INFO L225 Difference]: With dead ends: 1873 [2021-06-12 21:32:19,934 INFO L226 Difference]: Without dead ends: 1829 [2021-06-12 21:32:19,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-12 21:32:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-06-12 21:32:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 5.063758389261745) internal successors, (7545), 1490 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-06-12 21:32:19,957 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-06-12 21:32:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-06-12 21:32:19,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-06-12 21:32:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:19,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:19,961 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:20,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-12 21:32:20,176 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:20,176 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-06-12 21:32:20,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:20,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818528053] [2021-06-12 21:32:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:20,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818528053] [2021-06-12 21:32:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818528053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131930398] [2021-06-12 21:32:20,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:20,703 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 21:32:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:20,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131930398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:20,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:20,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:20,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043079929] [2021-06-12 21:32:20,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:20,821 INFO L87 Difference]: Start difference. First operand 1491 states and 7545 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:21,130 INFO L93 Difference]: Finished difference Result 1562 states and 7790 transitions. [2021-06-12 21:32:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:21,134 INFO L225 Difference]: With dead ends: 1562 [2021-06-12 21:32:21,134 INFO L226 Difference]: Without dead ends: 1557 [2021-06-12 21:32:21,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-12 21:32:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-06-12 21:32:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 5.055444221776887) internal successors, (7568), 1497 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-06-12 21:32:21,161 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-06-12 21:32:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:21,162 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-06-12 21:32:21,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-06-12 21:32:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:21,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:21,165 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:21,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:21,386 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:21,387 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-06-12 21:32:21,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:21,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057485426] [2021-06-12 21:32:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:21,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:21,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057485426] [2021-06-12 21:32:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057485426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:21,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381981886] [2021-06-12 21:32:21,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:21,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:21,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381981886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:21,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:21,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:21,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73062861] [2021-06-12 21:32:21,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:21,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:21,907 INFO L87 Difference]: Start difference. First operand 1498 states and 7568 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:22,260 INFO L93 Difference]: Finished difference Result 1612 states and 7977 transitions. [2021-06-12 21:32:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:22,264 INFO L225 Difference]: With dead ends: 1612 [2021-06-12 21:32:22,264 INFO L226 Difference]: Without dead ends: 1607 [2021-06-12 21:32:22,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-12 21:32:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-06-12 21:32:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 5.058271935699933) internal successors, (7552), 1493 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-06-12 21:32:22,287 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-06-12 21:32:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:22,287 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-06-12 21:32:22,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-06-12 21:32:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:32:22,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:22,290 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 21:32:22,493 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-06-12 21:32:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:22,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548302037] [2021-06-12 21:32:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:22,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:22,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548302037] [2021-06-12 21:32:22,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548302037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:22,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270605215] [2021-06-12 21:32:22,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:22,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:23,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270605215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:23,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:23,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:32:23,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430306314] [2021-06-12 21:32:23,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:23,174 INFO L87 Difference]: Start difference. First operand 1494 states and 7552 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:23,394 INFO L93 Difference]: Finished difference Result 1565 states and 7788 transitions. [2021-06-12 21:32:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:32:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:23,398 INFO L225 Difference]: With dead ends: 1565 [2021-06-12 21:32:23,398 INFO L226 Difference]: Without dead ends: 1560 [2021-06-12 21:32:23,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-12 21:32:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-06-12 21:32:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 5.061032863849765) internal successors, (7546), 1491 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-06-12 21:32:23,426 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-06-12 21:32:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:23,426 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-06-12 21:32:23,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-06-12 21:32:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:23,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:23,430 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:23,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:23,649 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-06-12 21:32:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817707068] [2021-06-12 21:32:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:23,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817707068] [2021-06-12 21:32:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817707068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092520121] [2021-06-12 21:32:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:32:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:23,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:23,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:23,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:23,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:23,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:24,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-12 21:32:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:32:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092520121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:24,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 21:32:24,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769856286] [2021-06-12 21:32:24,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:24,120 INFO L87 Difference]: Start difference. First operand 1492 states and 7546 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:24,389 INFO L93 Difference]: Finished difference Result 1515 states and 6870 transitions. [2021-06-12 21:32:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:24,392 INFO L225 Difference]: With dead ends: 1515 [2021-06-12 21:32:24,392 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 21:32:24,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 21:32:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-06-12 21:32:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 4.833596214511041) internal successors, (6129), 1268 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-06-12 21:32:24,412 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-06-12 21:32:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:24,412 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-06-12 21:32:24,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-06-12 21:32:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:24,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:24,415 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:24,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 21:32:24,615 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-06-12 21:32:24,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:24,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118808261] [2021-06-12 21:32:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:32:24,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118808261] [2021-06-12 21:32:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118808261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51584676] [2021-06-12 21:32:24,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:24,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:24,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:24,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:24,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-12 21:32:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:32:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51584676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:25,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 21:32:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983768987] [2021-06-12 21:32:25,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:32:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:32:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:32:25,059 INFO L87 Difference]: Start difference. First operand 1269 states and 6129 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:25,248 INFO L93 Difference]: Finished difference Result 1808 states and 7860 transitions. [2021-06-12 21:32:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:32:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:25,252 INFO L225 Difference]: With dead ends: 1808 [2021-06-12 21:32:25,253 INFO L226 Difference]: Without dead ends: 1773 [2021-06-12 21:32:25,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-12 21:32:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-06-12 21:32:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 4.688552188552189) internal successors, (5570), 1188 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-06-12 21:32:25,284 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-06-12 21:32:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:25,284 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-06-12 21:32:25,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-06-12 21:32:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:25,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:25,287 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:25,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:25,501 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-06-12 21:32:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:25,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652271955] [2021-06-12 21:32:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:25,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:25,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652271955] [2021-06-12 21:32:25,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652271955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:25,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980306392] [2021-06-12 21:32:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:25,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:26,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980306392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:26,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:26,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:26,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032961113] [2021-06-12 21:32:26,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:26,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:26,296 INFO L87 Difference]: Start difference. First operand 1189 states and 5570 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:26,485 INFO L93 Difference]: Finished difference Result 1244 states and 5694 transitions. [2021-06-12 21:32:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:26,487 INFO L225 Difference]: With dead ends: 1244 [2021-06-12 21:32:26,487 INFO L226 Difference]: Without dead ends: 1230 [2021-06-12 21:32:26,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-12 21:32:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-06-12 21:32:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.66) internal successors, (5592), 1200 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-06-12 21:32:26,505 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-06-12 21:32:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:26,505 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-06-12 21:32:26,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-06-12 21:32:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:26,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:26,508 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:26,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:26,725 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-06-12 21:32:26,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:26,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332769514] [2021-06-12 21:32:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:26,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:26,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332769514] [2021-06-12 21:32:26,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332769514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:26,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080939038] [2021-06-12 21:32:26,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:26,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:32:26,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:27,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080939038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:27,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:27,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:27,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849613345] [2021-06-12 21:32:27,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:27,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:27,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:27,295 INFO L87 Difference]: Start difference. First operand 1201 states and 5592 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:27,390 INFO L93 Difference]: Finished difference Result 1221 states and 5632 transitions. [2021-06-12 21:32:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:32:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:27,393 INFO L225 Difference]: With dead ends: 1221 [2021-06-12 21:32:27,393 INFO L226 Difference]: Without dead ends: 1217 [2021-06-12 21:32:27,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-12 21:32:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-06-12 21:32:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.649501661129568) internal successors, (5598), 1204 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-06-12 21:32:27,409 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-06-12 21:32:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:27,410 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-06-12 21:32:27,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-06-12 21:32:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:27,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:27,412 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:27,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 21:32:27,612 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-06-12 21:32:27,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:27,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836676244] [2021-06-12 21:32:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:27,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:27,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836676244] [2021-06-12 21:32:27,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836676244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:27,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572361461] [2021-06-12 21:32:27,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:27,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:27,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:28,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:28,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:28,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:28,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572361461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:28,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427388944] [2021-06-12 21:32:28,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:28,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:28,198 INFO L87 Difference]: Start difference. First operand 1205 states and 5598 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:28,397 INFO L93 Difference]: Finished difference Result 1274 states and 5779 transitions. [2021-06-12 21:32:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:28,400 INFO L225 Difference]: With dead ends: 1274 [2021-06-12 21:32:28,400 INFO L226 Difference]: Without dead ends: 1261 [2021-06-12 21:32:28,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-12 21:32:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-06-12 21:32:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 4.650912106135987) internal successors, (5609), 1206 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-06-12 21:32:28,416 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-06-12 21:32:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:28,416 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-06-12 21:32:28,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-06-12 21:32:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:28,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:28,418 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:28,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-12 21:32:28,619 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-06-12 21:32:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:28,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287555806] [2021-06-12 21:32:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:28,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:28,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287555806] [2021-06-12 21:32:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287555806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831298092] [2021-06-12 21:32:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:29,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831298092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:29,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:29,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196925435] [2021-06-12 21:32:29,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:29,292 INFO L87 Difference]: Start difference. First operand 1207 states and 5609 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:29,585 INFO L93 Difference]: Finished difference Result 1233 states and 5664 transitions. [2021-06-12 21:32:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:29,588 INFO L225 Difference]: With dead ends: 1233 [2021-06-12 21:32:29,588 INFO L226 Difference]: Without dead ends: 1225 [2021-06-12 21:32:29,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-12 21:32:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-06-12 21:32:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.646179401993355) internal successors, (5594), 1204 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-06-12 21:32:29,604 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-06-12 21:32:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:29,604 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-06-12 21:32:29,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-06-12 21:32:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:29,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:29,607 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:29,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:29,807 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-06-12 21:32:29,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:29,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696744016] [2021-06-12 21:32:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:29,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696744016] [2021-06-12 21:32:29,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696744016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223601924] [2021-06-12 21:32:29,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:30,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:30,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:30,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:30,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:30,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:30,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223601924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:30,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:30,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:30,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135600194] [2021-06-12 21:32:30,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:30,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:30,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:30,355 INFO L87 Difference]: Start difference. First operand 1205 states and 5594 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:30,766 INFO L93 Difference]: Finished difference Result 1253 states and 5719 transitions. [2021-06-12 21:32:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:30,768 INFO L225 Difference]: With dead ends: 1253 [2021-06-12 21:32:30,768 INFO L226 Difference]: Without dead ends: 1240 [2021-06-12 21:32:30,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:32:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-12 21:32:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-06-12 21:32:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.651666666666666) internal successors, (5582), 1200 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-06-12 21:32:30,784 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-06-12 21:32:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:30,784 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-06-12 21:32:30,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-06-12 21:32:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:30,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:30,786 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:30,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:30,987 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-06-12 21:32:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:30,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064206210] [2021-06-12 21:32:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:31,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:31,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064206210] [2021-06-12 21:32:31,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064206210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:31,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902028600] [2021-06-12 21:32:31,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:31,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:31,539 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-06-12 21:32:31,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:31,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:31,566 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-06-12 21:32:31,566 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-06-12 21:32:31,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:31,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-06-12 21:32:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:31,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902028600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:31,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:31,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:31,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258773991] [2021-06-12 21:32:31,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:31,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:31,608 INFO L87 Difference]: Start difference. First operand 1201 states and 5582 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:32,056 INFO L93 Difference]: Finished difference Result 1242 states and 5695 transitions. [2021-06-12 21:32:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:32,058 INFO L225 Difference]: With dead ends: 1242 [2021-06-12 21:32:32,058 INFO L226 Difference]: Without dead ends: 1227 [2021-06-12 21:32:32,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:32:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-12 21:32:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-06-12 21:32:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 4.6490066225165565) internal successors, (5616), 1208 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-06-12 21:32:32,085 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-06-12 21:32:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:32,085 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-06-12 21:32:32,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-06-12 21:32:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:32,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:32,088 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 21:32:32,288 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-06-12 21:32:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862135612] [2021-06-12 21:32:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:32,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862135612] [2021-06-12 21:32:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862135612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204796683] [2021-06-12 21:32:32,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:32,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:32,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:32,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:32,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:32,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:32,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:32:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204796683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:32,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:32,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 21:32:32,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595887024] [2021-06-12 21:32:32,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:32,746 INFO L87 Difference]: Start difference. First operand 1209 states and 5616 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:33,000 INFO L93 Difference]: Finished difference Result 1237 states and 5305 transitions. [2021-06-12 21:32:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:33,003 INFO L225 Difference]: With dead ends: 1237 [2021-06-12 21:32:33,003 INFO L226 Difference]: Without dead ends: 1213 [2021-06-12 21:32:33,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-06-12 21:32:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-06-12 21:32:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.60418648905804) internal successors, (4839), 1051 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-06-12 21:32:33,017 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-06-12 21:32:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:33,017 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-06-12 21:32:33,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-06-12 21:32:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:33,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:33,019 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:33,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:33,220 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-06-12 21:32:33,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:33,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822029051] [2021-06-12 21:32:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:33,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822029051] [2021-06-12 21:32:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822029051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307294824] [2021-06-12 21:32:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:33,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:32:33,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307294824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:33,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:33,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397575999] [2021-06-12 21:32:33,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:33,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:33,828 INFO L87 Difference]: Start difference. First operand 1052 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:34,017 INFO L93 Difference]: Finished difference Result 1096 states and 4937 transitions. [2021-06-12 21:32:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:34,020 INFO L225 Difference]: With dead ends: 1096 [2021-06-12 21:32:34,020 INFO L226 Difference]: Without dead ends: 1074 [2021-06-12 21:32:34,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-12 21:32:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-06-12 21:32:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.598665395614871) internal successors, (4824), 1049 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-06-12 21:32:34,033 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-06-12 21:32:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:34,033 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-06-12 21:32:34,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-06-12 21:32:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:34,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:34,036 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:34,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:34,241 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-06-12 21:32:34,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:34,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254207631] [2021-06-12 21:32:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:34,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254207631] [2021-06-12 21:32:34,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254207631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085558870] [2021-06-12 21:32:34,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:34,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:34,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:34,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:34,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:34,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 21:32:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:34,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085558870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:34,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109143313] [2021-06-12 21:32:34,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:34,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:34,757 INFO L87 Difference]: Start difference. First operand 1050 states and 4824 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:34,904 INFO L93 Difference]: Finished difference Result 1099 states and 4955 transitions. [2021-06-12 21:32:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:34,907 INFO L225 Difference]: With dead ends: 1099 [2021-06-12 21:32:34,907 INFO L226 Difference]: Without dead ends: 1086 [2021-06-12 21:32:34,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-12 21:32:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-06-12 21:32:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.604784688995215) internal successors, (4812), 1045 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-06-12 21:32:34,921 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-06-12 21:32:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-06-12 21:32:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-06-12 21:32:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:34,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:34,923 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:35,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 21:32:35,126 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-06-12 21:32:35,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:35,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2165598] [2021-06-12 21:32:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:35,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:35,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2165598] [2021-06-12 21:32:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2165598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:35,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852469788] [2021-06-12 21:32:35,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:35,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:35,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852469788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:35,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:35,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:35,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100249693] [2021-06-12 21:32:35,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:35,732 INFO L87 Difference]: Start difference. First operand 1046 states and 4812 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:35,986 INFO L93 Difference]: Finished difference Result 1140 states and 5064 transitions. [2021-06-12 21:32:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:35,989 INFO L225 Difference]: With dead ends: 1140 [2021-06-12 21:32:35,989 INFO L226 Difference]: Without dead ends: 1108 [2021-06-12 21:32:35,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-12 21:32:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-06-12 21:32:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 4.581285444234404) internal successors, (4847), 1058 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-06-12 21:32:36,002 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-06-12 21:32:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:36,002 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-06-12 21:32:36,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-06-12 21:32:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:36,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:36,004 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:36,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:36,205 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-06-12 21:32:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:36,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998052878] [2021-06-12 21:32:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998052878] [2021-06-12 21:32:36,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998052878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713406167] [2021-06-12 21:32:36,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:36,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:36,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:36,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:36,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:36,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713406167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:36,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:36,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321565187] [2021-06-12 21:32:36,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:36,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:36,743 INFO L87 Difference]: Start difference. First operand 1059 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:37,062 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-06-12 21:32:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:37,064 INFO L225 Difference]: With dead ends: 1101 [2021-06-12 21:32:37,064 INFO L226 Difference]: Without dead ends: 1086 [2021-06-12 21:32:37,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:32:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-12 21:32:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-06-12 21:32:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.583018867924529) internal successors, (4858), 1060 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-06-12 21:32:37,078 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-06-12 21:32:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:37,078 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-06-12 21:32:37,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-06-12 21:32:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:37,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:37,080 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:37,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:37,280 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-06-12 21:32:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653544858] [2021-06-12 21:32:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:37,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653544858] [2021-06-12 21:32:37,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653544858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256768591] [2021-06-12 21:32:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:37,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:37,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256768591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105240088] [2021-06-12 21:32:37,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:37,874 INFO L87 Difference]: Start difference. First operand 1061 states and 4858 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:38,098 INFO L93 Difference]: Finished difference Result 1142 states and 5070 transitions. [2021-06-12 21:32:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:38,101 INFO L225 Difference]: With dead ends: 1142 [2021-06-12 21:32:38,101 INFO L226 Difference]: Without dead ends: 1110 [2021-06-12 21:32:38,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-12 21:32:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-06-12 21:32:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.6017191977077365) internal successors, (4818), 1047 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-06-12 21:32:38,115 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-06-12 21:32:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:38,115 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-06-12 21:32:38,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-06-12 21:32:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:38,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:38,117 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:38,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:38,321 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-06-12 21:32:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:38,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835155638] [2021-06-12 21:32:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835155638] [2021-06-12 21:32:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835155638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038317980] [2021-06-12 21:32:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:38,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038317980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:38,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:38,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-12 21:32:38,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517256320] [2021-06-12 21:32:38,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:38,985 INFO L87 Difference]: Start difference. First operand 1048 states and 4818 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:39,445 INFO L93 Difference]: Finished difference Result 1070 states and 4863 transitions. [2021-06-12 21:32:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:39,447 INFO L225 Difference]: With dead ends: 1070 [2021-06-12 21:32:39,447 INFO L226 Difference]: Without dead ends: 1066 [2021-06-12 21:32:39,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:32:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-12 21:32:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-06-12 21:32:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.5978987583572115) internal successors, (4814), 1047 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-06-12 21:32:39,462 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-06-12 21:32:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:39,462 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-06-12 21:32:39,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-06-12 21:32:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:39,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:39,464 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:39,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:39,666 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:39,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-06-12 21:32:39,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:39,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595412296] [2021-06-12 21:32:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:39,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:39,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595412296] [2021-06-12 21:32:39,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595412296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:39,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676578830] [2021-06-12 21:32:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:39,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:40,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:40,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:40,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:40,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:40,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676578830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:40,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:40,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241910585] [2021-06-12 21:32:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:40,279 INFO L87 Difference]: Start difference. First operand 1048 states and 4814 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:40,500 INFO L93 Difference]: Finished difference Result 1107 states and 4970 transitions. [2021-06-12 21:32:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:40,502 INFO L225 Difference]: With dead ends: 1107 [2021-06-12 21:32:40,502 INFO L226 Difference]: Without dead ends: 1092 [2021-06-12 21:32:40,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-12 21:32:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-06-12 21:32:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.599618684461392) internal successors, (4825), 1049 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-06-12 21:32:40,515 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-06-12 21:32:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:40,515 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-06-12 21:32:40,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-06-12 21:32:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:40,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:40,517 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:40,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:40,718 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-06-12 21:32:40,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:40,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996285571] [2021-06-12 21:32:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:40,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996285571] [2021-06-12 21:32:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996285571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903276201] [2021-06-12 21:32:40,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:40,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:32:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:32:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903276201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:41,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303943041] [2021-06-12 21:32:41,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:41,305 INFO L87 Difference]: Start difference. First operand 1050 states and 4825 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:41,638 INFO L93 Difference]: Finished difference Result 1072 states and 4870 transitions. [2021-06-12 21:32:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:41,638 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:41,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:41,640 INFO L225 Difference]: With dead ends: 1072 [2021-06-12 21:32:41,640 INFO L226 Difference]: Without dead ends: 1064 [2021-06-12 21:32:41,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-12 21:32:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-06-12 21:32:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.598086124401914) internal successors, (4805), 1045 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-06-12 21:32:41,655 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-06-12 21:32:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:41,655 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-06-12 21:32:41,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-06-12 21:32:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:41,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:41,657 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:41,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 21:32:41,857 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-06-12 21:32:41,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:41,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385621630] [2021-06-12 21:32:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:41,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385621630] [2021-06-12 21:32:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385621630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988471651] [2021-06-12 21:32:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:42,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988471651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:42,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:42,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:42,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332116553] [2021-06-12 21:32:42,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:42,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:42,570 INFO L87 Difference]: Start difference. First operand 1046 states and 4805 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:42,878 INFO L93 Difference]: Finished difference Result 1067 states and 4747 transitions. [2021-06-12 21:32:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:42,880 INFO L225 Difference]: With dead ends: 1067 [2021-06-12 21:32:42,881 INFO L226 Difference]: Without dead ends: 1049 [2021-06-12 21:32:42,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 732.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-12 21:32:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-06-12 21:32:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 4.565476190476191) internal successors, (4602), 1008 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-06-12 21:32:42,893 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-06-12 21:32:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:42,893 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-06-12 21:32:42,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-06-12 21:32:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:42,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:42,894 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:43,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:43,095 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-06-12 21:32:43,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:43,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731700048] [2021-06-12 21:32:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:43,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:43,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731700048] [2021-06-12 21:32:43,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731700048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:43,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257308414] [2021-06-12 21:32:43,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:43,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:43,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:32:43,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:43,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:43,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:43,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:43,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:32:43,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-06-12 21:32:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:43,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257308414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:43,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:43,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:32:43,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892742995] [2021-06-12 21:32:43,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:43,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:43,525 INFO L87 Difference]: Start difference. First operand 1009 states and 4602 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:43,798 INFO L93 Difference]: Finished difference Result 1207 states and 4868 transitions. [2021-06-12 21:32:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:43,800 INFO L225 Difference]: With dead ends: 1207 [2021-06-12 21:32:43,800 INFO L226 Difference]: Without dead ends: 1179 [2021-06-12 21:32:43,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-12 21:32:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-06-12 21:32:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 4.41991341991342) internal successors, (4084), 924 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-06-12 21:32:43,813 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-06-12 21:32:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:43,813 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-06-12 21:32:43,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-06-12 21:32:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:43,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:43,814 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:44,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 21:32:44,015 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-06-12 21:32:44,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:44,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781381634] [2021-06-12 21:32:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:44,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781381634] [2021-06-12 21:32:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781381634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873260902] [2021-06-12 21:32:44,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:44,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:32:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:44,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-12 21:32:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:44,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873260902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:44,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:44,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283188845] [2021-06-12 21:32:44,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:44,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:44,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:44,734 INFO L87 Difference]: Start difference. First operand 925 states and 4084 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:45,208 INFO L93 Difference]: Finished difference Result 955 states and 4153 transitions. [2021-06-12 21:32:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:45,210 INFO L225 Difference]: With dead ends: 955 [2021-06-12 21:32:45,210 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 21:32:45,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:32:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 21:32:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-06-12 21:32:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 4.411447084233261) internal successors, (4085), 926 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-06-12 21:32:45,222 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-06-12 21:32:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:45,223 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-06-12 21:32:45,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-06-12 21:32:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:45,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:45,224 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:45,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-12 21:32:45,441 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-06-12 21:32:45,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:45,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269202038] [2021-06-12 21:32:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:45,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269202038] [2021-06-12 21:32:45,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269202038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607602446] [2021-06-12 21:32:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:45,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:45,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:46,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:46,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:46,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:46,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607602446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:46,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:46,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501139501] [2021-06-12 21:32:46,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:46,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:46,060 INFO L87 Difference]: Start difference. First operand 927 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:46,540 INFO L93 Difference]: Finished difference Result 1002 states and 4289 transitions. [2021-06-12 21:32:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:46,551 INFO L225 Difference]: With dead ends: 1002 [2021-06-12 21:32:46,551 INFO L226 Difference]: Without dead ends: 989 [2021-06-12 21:32:46,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:32:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-12 21:32:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-06-12 21:32:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 4.411827956989248) internal successors, (4103), 930 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-06-12 21:32:46,563 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-06-12 21:32:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:46,563 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-06-12 21:32:46,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-06-12 21:32:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:46,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:46,564 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:46,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 21:32:46,777 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-06-12 21:32:46,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:46,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714729203] [2021-06-12 21:32:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:46,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714729203] [2021-06-12 21:32:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714729203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558297136] [2021-06-12 21:32:46,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:46,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:47,594 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-12 21:32:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558297136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:47,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:47,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072980881] [2021-06-12 21:32:47,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:47,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:47,663 INFO L87 Difference]: Start difference. First operand 931 states and 4103 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:47,747 INFO L93 Difference]: Finished difference Result 963 states and 4175 transitions. [2021-06-12 21:32:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:47,749 INFO L225 Difference]: With dead ends: 963 [2021-06-12 21:32:47,749 INFO L226 Difference]: Without dead ends: 955 [2021-06-12 21:32:47,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-12 21:32:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-06-12 21:32:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 4.405172413793103) internal successors, (4088), 928 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-06-12 21:32:47,761 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-06-12 21:32:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:47,761 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-06-12 21:32:47,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-06-12 21:32:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:47,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:47,762 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:47,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 21:32:47,963 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-06-12 21:32:47,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263631661] [2021-06-12 21:32:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:48,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263631661] [2021-06-12 21:32:48,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263631661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519091911] [2021-06-12 21:32:48,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:48,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:48,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:48,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:48,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:48,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:48,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519091911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:48,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767535661] [2021-06-12 21:32:48,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:48,426 INFO L87 Difference]: Start difference. First operand 929 states and 4088 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:48,583 INFO L93 Difference]: Finished difference Result 978 states and 4219 transitions. [2021-06-12 21:32:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:48,585 INFO L225 Difference]: With dead ends: 978 [2021-06-12 21:32:48,585 INFO L226 Difference]: Without dead ends: 965 [2021-06-12 21:32:48,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-12 21:32:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-06-12 21:32:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 4.417391304347826) internal successors, (4064), 920 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-06-12 21:32:48,596 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-06-12 21:32:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:48,596 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-06-12 21:32:48,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-06-12 21:32:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:48,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:48,598 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:48,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:48,799 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-06-12 21:32:48,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:48,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440946798] [2021-06-12 21:32:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:48,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440946798] [2021-06-12 21:32:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440946798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999121158] [2021-06-12 21:32:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:49,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:49,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:49,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:49,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:49,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 21:32:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:49,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999121158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:49,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033226079] [2021-06-12 21:32:49,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:49,276 INFO L87 Difference]: Start difference. First operand 921 states and 4064 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:49,501 INFO L93 Difference]: Finished difference Result 962 states and 4159 transitions. [2021-06-12 21:32:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:32:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:49,503 INFO L225 Difference]: With dead ends: 962 [2021-06-12 21:32:49,503 INFO L226 Difference]: Without dead ends: 947 [2021-06-12 21:32:49,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-12 21:32:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-06-12 21:32:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 4.415032679738562) internal successors, (4053), 918 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-06-12 21:32:49,515 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-06-12 21:32:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:49,515 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-06-12 21:32:49,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-06-12 21:32:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:49,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:49,517 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:49,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:49,717 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-06-12 21:32:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:49,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724132327] [2021-06-12 21:32:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724132327] [2021-06-12 21:32:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724132327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661506014] [2021-06-12 21:32:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:49,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661506014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:50,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:50,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646801498] [2021-06-12 21:32:50,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:50,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:50,255 INFO L87 Difference]: Start difference. First operand 919 states and 4053 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:50,640 INFO L93 Difference]: Finished difference Result 945 states and 4108 transitions. [2021-06-12 21:32:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:50,642 INFO L225 Difference]: With dead ends: 945 [2021-06-12 21:32:50,642 INFO L226 Difference]: Without dead ends: 943 [2021-06-12 21:32:50,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:32:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-12 21:32:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-06-12 21:32:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 4.41703056768559) internal successors, (4046), 916 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-06-12 21:32:50,653 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-06-12 21:32:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:50,654 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-06-12 21:32:50,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-06-12 21:32:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:50,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:50,655 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:50,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 21:32:50,856 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-06-12 21:32:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:50,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277225543] [2021-06-12 21:32:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:50,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277225543] [2021-06-12 21:32:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277225543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250370573] [2021-06-12 21:32:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:51,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:51,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:51,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:32:51,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:51,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:51,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:51,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:51,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:51,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:32:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:51,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250370573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:51,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:51,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625072319] [2021-06-12 21:32:51,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:51,432 INFO L87 Difference]: Start difference. First operand 917 states and 4046 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:51,661 INFO L93 Difference]: Finished difference Result 1234 states and 5095 transitions. [2021-06-12 21:32:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:32:51,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:51,663 INFO L225 Difference]: With dead ends: 1234 [2021-06-12 21:32:51,663 INFO L226 Difference]: Without dead ends: 1207 [2021-06-12 21:32:51,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:32:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-12 21:32:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-06-12 21:32:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.458246346555324) internal successors, (4271), 958 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-06-12 21:32:51,678 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-06-12 21:32:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:51,678 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-06-12 21:32:51,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-06-12 21:32:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:51,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:51,679 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:51,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 21:32:51,880 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:51,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-06-12 21:32:51,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:51,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765731335] [2021-06-12 21:32:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:52,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765731335] [2021-06-12 21:32:52,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765731335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932941283] [2021-06-12 21:32:52,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:52,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:52,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:52,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:52,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932941283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:52,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:32:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950269840] [2021-06-12 21:32:52,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:52,532 INFO L87 Difference]: Start difference. First operand 959 states and 4271 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:52,885 INFO L93 Difference]: Finished difference Result 991 states and 4347 transitions. [2021-06-12 21:32:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:32:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:52,887 INFO L225 Difference]: With dead ends: 991 [2021-06-12 21:32:52,887 INFO L226 Difference]: Without dead ends: 987 [2021-06-12 21:32:52,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 674.4ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-12 21:32:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-06-12 21:32:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.449895615866389) internal successors, (4263), 958 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-06-12 21:32:52,900 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-06-12 21:32:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:52,900 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-06-12 21:32:52,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-06-12 21:32:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:52,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:52,901 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:53,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 21:32:53,111 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-06-12 21:32:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:53,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832281042] [2021-06-12 21:32:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:32:53,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:53,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832281042] [2021-06-12 21:32:53,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832281042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639979175] [2021-06-12 21:32:53,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:53,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:32:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:53,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:53,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:53,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 21:32:53,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:53,458 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-06-12 21:32:53,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:32:53,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-06-12 21:32:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:32:53,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639979175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:53,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 21:32:53,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213290943] [2021-06-12 21:32:53,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:53,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:53,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:53,503 INFO L87 Difference]: Start difference. First operand 959 states and 4263 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:53,598 INFO L93 Difference]: Finished difference Result 920 states and 3669 transitions. [2021-06-12 21:32:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:53,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:53,600 INFO L225 Difference]: With dead ends: 920 [2021-06-12 21:32:53,600 INFO L226 Difference]: Without dead ends: 892 [2021-06-12 21:32:53,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-06-12 21:32:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-06-12 21:32:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.2204724409448815) internal successors, (3216), 762 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-06-12 21:32:53,609 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-06-12 21:32:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:53,609 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-06-12 21:32:53,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-06-12 21:32:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:53,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:53,611 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:53,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:53,811 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-06-12 21:32:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:53,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335000602] [2021-06-12 21:32:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:53,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335000602] [2021-06-12 21:32:53,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335000602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87208060] [2021-06-12 21:32:53,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:53,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:32:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:54,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:54,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:54,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:54,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:54,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:54,105 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-06-12 21:32:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87208060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:54,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:54,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 21:32:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887766432] [2021-06-12 21:32:54,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:54,430 INFO L87 Difference]: Start difference. First operand 763 states and 3216 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:54,690 INFO L93 Difference]: Finished difference Result 1219 states and 4777 transitions. [2021-06-12 21:32:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:54,692 INFO L225 Difference]: With dead ends: 1219 [2021-06-12 21:32:54,692 INFO L226 Difference]: Without dead ends: 1159 [2021-06-12 21:32:54,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-12 21:32:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-06-12 21:32:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 4.203921568627451) internal successors, (3216), 765 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-06-12 21:32:54,703 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-06-12 21:32:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:54,703 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-06-12 21:32:54,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-06-12 21:32:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:54,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:54,704 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-12 21:32:54,909 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-06-12 21:32:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248129164] [2021-06-12 21:32:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:55,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:55,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248129164] [2021-06-12 21:32:55,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248129164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:55,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296266292] [2021-06-12 21:32:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:55,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:32:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:32:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296266292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:55,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:55,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:32:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078375424] [2021-06-12 21:32:55,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:55,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:55,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:55,539 INFO L87 Difference]: Start difference. First operand 766 states and 3216 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:55,833 INFO L93 Difference]: Finished difference Result 817 states and 3362 transitions. [2021-06-12 21:32:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:55,834 INFO L225 Difference]: With dead ends: 817 [2021-06-12 21:32:55,834 INFO L226 Difference]: Without dead ends: 808 [2021-06-12 21:32:55,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 632.5ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:32:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-12 21:32:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-06-12 21:32:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.186287192755498) internal successors, (3236), 773 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-06-12 21:32:55,844 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-06-12 21:32:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:55,844 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-06-12 21:32:55,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-06-12 21:32:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:55,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:55,845 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:56,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 21:32:56,046 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-06-12 21:32:56,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:56,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60152528] [2021-06-12 21:32:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:32:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60152528] [2021-06-12 21:32:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60152528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446387372] [2021-06-12 21:32:56,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:56,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:56,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:56,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:32:56,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:56,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:32:56,349 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 21:32:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:32:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446387372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:56,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 21:32:56,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169762156] [2021-06-12 21:32:56,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:56,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:56,483 INFO L87 Difference]: Start difference. First operand 774 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:56,690 INFO L93 Difference]: Finished difference Result 905 states and 3551 transitions. [2021-06-12 21:32:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:32:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:56,691 INFO L225 Difference]: With dead ends: 905 [2021-06-12 21:32:56,691 INFO L226 Difference]: Without dead ends: 865 [2021-06-12 21:32:56,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:32:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-06-12 21:32:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-06-12 21:32:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 4.175032175032175) internal successors, (3244), 777 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-06-12 21:32:56,701 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-06-12 21:32:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:56,701 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-06-12 21:32:56,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-06-12 21:32:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:56,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:56,702 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:56,905 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-06-12 21:32:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479695801] [2021-06-12 21:32:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:57,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:57,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479695801] [2021-06-12 21:32:57,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479695801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:57,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571532926] [2021-06-12 21:32:57,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:57,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571532926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:32:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411199080] [2021-06-12 21:32:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:57,667 INFO L87 Difference]: Start difference. First operand 778 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:58,074 INFO L93 Difference]: Finished difference Result 825 states and 3382 transitions. [2021-06-12 21:32:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:58,076 INFO L225 Difference]: With dead ends: 825 [2021-06-12 21:32:58,076 INFO L226 Difference]: Without dead ends: 816 [2021-06-12 21:32:58,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 833.2ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:32:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-12 21:32:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-06-12 21:32:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-12 21:32:58,087 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-12 21:32:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:58,087 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-12 21:32:58,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-12 21:32:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:58,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:58,088 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:58,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:58,289 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-06-12 21:32:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122659256] [2021-06-12 21:32:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:58,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122659256] [2021-06-12 21:32:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122659256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537860962] [2021-06-12 21:32:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:58,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:32:58,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:32:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537860962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:59,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:59,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:32:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877043678] [2021-06-12 21:32:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:59,183 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:59,657 INFO L93 Difference]: Finished difference Result 833 states and 3402 transitions. [2021-06-12 21:32:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:32:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:59,659 INFO L225 Difference]: With dead ends: 833 [2021-06-12 21:32:59,659 INFO L226 Difference]: Without dead ends: 824 [2021-06-12 21:32:59,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 977.9ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:32:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-12 21:32:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-06-12 21:32:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-12 21:32:59,669 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-12 21:32:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:59,669 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-12 21:32:59,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:32:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-12 21:32:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:32:59,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:59,671 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:59,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 21:32:59,882 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-06-12 21:32:59,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:59,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031906191] [2021-06-12 21:32:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:00,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:00,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031906191] [2021-06-12 21:33:00,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031906191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:00,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297813569] [2021-06-12 21:33:00,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:00,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297813569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:00,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:00,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:00,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79867000] [2021-06-12 21:33:00,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:00,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:00,415 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:00,668 INFO L93 Difference]: Finished difference Result 860 states and 3503 transitions. [2021-06-12 21:33:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:00,669 INFO L225 Difference]: With dead ends: 860 [2021-06-12 21:33:00,669 INFO L226 Difference]: Without dead ends: 846 [2021-06-12 21:33:00,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-12 21:33:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-06-12 21:33:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.139650872817955) internal successors, (3320), 802 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-06-12 21:33:00,679 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-06-12 21:33:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:00,679 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-06-12 21:33:00,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-06-12 21:33:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:00,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:00,680 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:00,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:00,881 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-06-12 21:33:00,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:00,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689949411] [2021-06-12 21:33:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:01,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:01,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689949411] [2021-06-12 21:33:01,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689949411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:01,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176459446] [2021-06-12 21:33:01,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:01,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:33:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:01,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176459446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:01,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:01,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:01,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626018626] [2021-06-12 21:33:01,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:01,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:01,491 INFO L87 Difference]: Start difference. First operand 803 states and 3320 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:01,644 INFO L93 Difference]: Finished difference Result 846 states and 3446 transitions. [2021-06-12 21:33:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:01,646 INFO L225 Difference]: With dead ends: 846 [2021-06-12 21:33:01,646 INFO L226 Difference]: Without dead ends: 837 [2021-06-12 21:33:01,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-12 21:33:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-06-12 21:33:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.145363408521304) internal successors, (3308), 798 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-06-12 21:33:01,660 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-06-12 21:33:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:01,661 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-06-12 21:33:01,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-06-12 21:33:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:01,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:01,662 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:01,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:01,887 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:01,887 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-06-12 21:33:01,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:01,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807894275] [2021-06-12 21:33:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:01,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:01,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807894275] [2021-06-12 21:33:01,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807894275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:01,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49036943] [2021-06-12 21:33:01,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:02,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:33:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:02,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:02,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:02,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:02,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:02,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:02,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:02,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:02,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-12 21:33:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:02,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49036943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:02,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:02,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 21:33:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242737969] [2021-06-12 21:33:02,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:33:02,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:02,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:33:02,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:33:02,450 INFO L87 Difference]: Start difference. First operand 799 states and 3308 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:02,710 INFO L93 Difference]: Finished difference Result 858 states and 3412 transitions. [2021-06-12 21:33:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:02,712 INFO L225 Difference]: With dead ends: 858 [2021-06-12 21:33:02,712 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 21:33:02,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 21:33:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-06-12 21:33:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.111392405063291) internal successors, (3248), 790 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-06-12 21:33:02,721 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-06-12 21:33:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:02,721 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-06-12 21:33:02,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-06-12 21:33:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:02,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:02,722 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:02,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 21:33:02,923 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-06-12 21:33:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:02,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993779397] [2021-06-12 21:33:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:03,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:03,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993779397] [2021-06-12 21:33:03,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993779397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:03,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332965778] [2021-06-12 21:33:03,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:03,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332965778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:03,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:03,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:03,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913843049] [2021-06-12 21:33:03,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:03,665 INFO L87 Difference]: Start difference. First operand 791 states and 3248 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:03,907 INFO L93 Difference]: Finished difference Result 834 states and 3374 transitions. [2021-06-12 21:33:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:03,908 INFO L225 Difference]: With dead ends: 834 [2021-06-12 21:33:03,908 INFO L226 Difference]: Without dead ends: 825 [2021-06-12 21:33:03,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-12 21:33:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-06-12 21:33:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.103491271820449) internal successors, (3291), 802 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-06-12 21:33:03,917 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-06-12 21:33:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:03,917 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-06-12 21:33:03,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-06-12 21:33:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:03,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:03,919 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:04,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:04,119 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-06-12 21:33:04,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:04,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580640770] [2021-06-12 21:33:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580640770] [2021-06-12 21:33:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580640770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216280524] [2021-06-12 21:33:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:04,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:04,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:04,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216280524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:04,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:04,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489893848] [2021-06-12 21:33:04,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:04,774 INFO L87 Difference]: Start difference. First operand 803 states and 3291 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:05,065 INFO L93 Difference]: Finished difference Result 842 states and 3405 transitions. [2021-06-12 21:33:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:05,067 INFO L225 Difference]: With dead ends: 842 [2021-06-12 21:33:05,067 INFO L226 Difference]: Without dead ends: 833 [2021-06-12 21:33:05,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:33:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-06-12 21:33:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-06-12 21:33:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.109022556390977) internal successors, (3279), 798 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-06-12 21:33:05,076 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-06-12 21:33:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:05,076 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-06-12 21:33:05,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-06-12 21:33:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:05,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:05,077 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:05,278 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-06-12 21:33:05,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:05,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513974628] [2021-06-12 21:33:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:05,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513974628] [2021-06-12 21:33:05,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513974628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181292408] [2021-06-12 21:33:05,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:05,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:05,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:05,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181292408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:05,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:05,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:05,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803474379] [2021-06-12 21:33:05,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:05,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:05,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:05,922 INFO L87 Difference]: Start difference. First operand 799 states and 3279 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:06,226 INFO L93 Difference]: Finished difference Result 838 states and 3397 transitions. [2021-06-12 21:33:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:06,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:06,227 INFO L225 Difference]: With dead ends: 838 [2021-06-12 21:33:06,227 INFO L226 Difference]: Without dead ends: 829 [2021-06-12 21:33:06,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-06-12 21:33:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-06-12 21:33:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.125316455696202) internal successors, (3259), 790 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-06-12 21:33:06,237 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-06-12 21:33:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:06,237 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-06-12 21:33:06,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-06-12 21:33:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:06,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:06,238 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:06,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 21:33:06,438 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-06-12 21:33:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:06,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176785035] [2021-06-12 21:33:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:06,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:06,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176785035] [2021-06-12 21:33:06,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176785035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:06,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922966651] [2021-06-12 21:33:06,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:06,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:06,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:07,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922966651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:07,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:07,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:07,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552121412] [2021-06-12 21:33:07,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:07,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:07,048 INFO L87 Difference]: Start difference. First operand 791 states and 3259 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:07,298 INFO L93 Difference]: Finished difference Result 828 states and 3368 transitions. [2021-06-12 21:33:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:07,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:07,300 INFO L225 Difference]: With dead ends: 828 [2021-06-12 21:33:07,300 INFO L226 Difference]: Without dead ends: 819 [2021-06-12 21:33:07,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:33:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-12 21:33:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-06-12 21:33:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 4.135204081632653) internal successors, (3242), 784 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-06-12 21:33:07,313 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-06-12 21:33:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:07,313 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-06-12 21:33:07,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-06-12 21:33:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:07,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:07,315 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:07,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:07,529 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-06-12 21:33:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254590471] [2021-06-12 21:33:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:07,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254590471] [2021-06-12 21:33:07,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254590471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937259726] [2021-06-12 21:33:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:07,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:33:07,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:33:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:07,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:07,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:07,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:07,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:07,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:07,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-12 21:33:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:08,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937259726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:08,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:08,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:33:08,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830296271] [2021-06-12 21:33:08,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:33:08,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:33:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:33:08,102 INFO L87 Difference]: Start difference. First operand 785 states and 3242 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:08,340 INFO L93 Difference]: Finished difference Result 1456 states and 5972 transitions. [2021-06-12 21:33:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:08,342 INFO L225 Difference]: With dead ends: 1456 [2021-06-12 21:33:08,342 INFO L226 Difference]: Without dead ends: 1428 [2021-06-12 21:33:08,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-12 21:33:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-06-12 21:33:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 4.450592885375494) internal successors, (4504), 1012 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-06-12 21:33:08,363 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-06-12 21:33:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:08,363 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-06-12 21:33:08,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-06-12 21:33:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:08,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:08,365 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:08,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:08,589 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-06-12 21:33:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:08,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383435411] [2021-06-12 21:33:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:08,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:08,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383435411] [2021-06-12 21:33:08,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383435411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:08,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76369321] [2021-06-12 21:33:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:08,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:33:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76369321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:09,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:09,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207566447] [2021-06-12 21:33:09,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:09,345 INFO L87 Difference]: Start difference. First operand 1013 states and 4504 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:09,632 INFO L93 Difference]: Finished difference Result 1046 states and 4594 transitions. [2021-06-12 21:33:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:09,634 INFO L225 Difference]: With dead ends: 1046 [2021-06-12 21:33:09,634 INFO L226 Difference]: Without dead ends: 1037 [2021-06-12 21:33:09,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-12 21:33:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-06-12 21:33:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 4.439646712463199) internal successors, (4524), 1019 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-06-12 21:33:09,647 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-06-12 21:33:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:09,647 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-06-12 21:33:09,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-06-12 21:33:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:09,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:09,648 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:09,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-12 21:33:09,849 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-06-12 21:33:09,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:09,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049325536] [2021-06-12 21:33:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:09,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:09,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049325536] [2021-06-12 21:33:09,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049325536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:09,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432818860] [2021-06-12 21:33:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:10,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432818860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:10,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:10,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:10,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422045449] [2021-06-12 21:33:10,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:10,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:10,525 INFO L87 Difference]: Start difference. First operand 1020 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:10,928 INFO L93 Difference]: Finished difference Result 1059 states and 4642 transitions. [2021-06-12 21:33:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:10,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:10,930 INFO L225 Difference]: With dead ends: 1059 [2021-06-12 21:33:10,930 INFO L226 Difference]: Without dead ends: 1050 [2021-06-12 21:33:10,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-12 21:33:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-06-12 21:33:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 4.448140900195694) internal successors, (4546), 1022 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-06-12 21:33:10,943 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-06-12 21:33:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:10,943 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-06-12 21:33:10,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-06-12 21:33:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:10,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:10,945 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:11,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:11,145 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-06-12 21:33:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:11,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355710335] [2021-06-12 21:33:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:11,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355710335] [2021-06-12 21:33:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355710335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318318594] [2021-06-12 21:33:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:11,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:11,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:11,801 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-12 21:33:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318318594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:11,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:11,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535067433] [2021-06-12 21:33:11,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:11,999 INFO L87 Difference]: Start difference. First operand 1023 states and 4546 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:12,292 INFO L93 Difference]: Finished difference Result 1064 states and 4663 transitions. [2021-06-12 21:33:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:12,294 INFO L225 Difference]: With dead ends: 1064 [2021-06-12 21:33:12,294 INFO L226 Difference]: Without dead ends: 1055 [2021-06-12 21:33:12,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-12 21:33:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-06-12 21:33:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 4.457677165354331) internal successors, (4529), 1016 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-06-12 21:33:12,307 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-06-12 21:33:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-06-12 21:33:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-06-12 21:33:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:12,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:12,308 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:12,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:12,510 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-06-12 21:33:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:12,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478591232] [2021-06-12 21:33:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:12,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:12,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478591232] [2021-06-12 21:33:12,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478591232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:12,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207209166] [2021-06-12 21:33:12,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:12,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:33:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:13,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207209166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:13,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:13,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324675521] [2021-06-12 21:33:13,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:13,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:13,295 INFO L87 Difference]: Start difference. First operand 1017 states and 4529 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:13,814 INFO L93 Difference]: Finished difference Result 1054 states and 4614 transitions. [2021-06-12 21:33:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:13,816 INFO L225 Difference]: With dead ends: 1054 [2021-06-12 21:33:13,817 INFO L226 Difference]: Without dead ends: 1041 [2021-06-12 21:33:13,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 958.3ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:33:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-12 21:33:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-06-12 21:33:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 4.461386138613862) internal successors, (4506), 1010 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-06-12 21:33:13,829 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-06-12 21:33:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:13,829 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-06-12 21:33:13,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-06-12 21:33:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:13,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:13,830 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:14,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 21:33:14,031 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:14,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-06-12 21:33:14,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:14,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314887664] [2021-06-12 21:33:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:14,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:14,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314887664] [2021-06-12 21:33:14,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314887664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:14,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999396828] [2021-06-12 21:33:14,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:14,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:33:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:14,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:14,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:14,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:14,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:14,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:14,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 21:33:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:14,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999396828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:14,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:14,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-06-12 21:33:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189669071] [2021-06-12 21:33:14,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:33:14,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:14,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:33:14,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:33:14,511 INFO L87 Difference]: Start difference. First operand 1011 states and 4506 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:14,847 INFO L93 Difference]: Finished difference Result 1144 states and 4731 transitions. [2021-06-12 21:33:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:33:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:14,849 INFO L225 Difference]: With dead ends: 1144 [2021-06-12 21:33:14,849 INFO L226 Difference]: Without dead ends: 1094 [2021-06-12 21:33:14,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-12 21:33:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-06-12 21:33:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.441025641025641) internal successors, (4330), 975 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-06-12 21:33:14,861 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-06-12 21:33:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:14,861 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-06-12 21:33:14,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-06-12 21:33:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:14,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:14,863 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:15,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-12 21:33:15,063 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-06-12 21:33:15,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:15,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268426769] [2021-06-12 21:33:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:15,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268426769] [2021-06-12 21:33:15,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268426769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:15,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879151689] [2021-06-12 21:33:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:15,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:33:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879151689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448340537] [2021-06-12 21:33:15,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:15,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:15,877 INFO L87 Difference]: Start difference. First operand 976 states and 4330 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:16,357 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-12 21:33:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:16,359 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 21:33:16,359 INFO L226 Difference]: Without dead ends: 1024 [2021-06-12 21:33:16,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:33:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-12 21:33:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-06-12 21:33:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 4.435137895812053) internal successors, (4342), 979 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-06-12 21:33:16,371 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-06-12 21:33:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:16,371 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-06-12 21:33:16,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-06-12 21:33:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:16,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:16,373 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:16,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-12 21:33:16,573 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-06-12 21:33:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006018699] [2021-06-12 21:33:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:16,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:16,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006018699] [2021-06-12 21:33:16,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006018699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:16,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931560999] [2021-06-12 21:33:16,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:16,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:33:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:17,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931560999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:17,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:17,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462978157] [2021-06-12 21:33:17,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:17,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:17,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:17,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:17,365 INFO L87 Difference]: Start difference. First operand 980 states and 4342 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:17,647 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-12 21:33:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:17,649 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 21:33:17,649 INFO L226 Difference]: Without dead ends: 1024 [2021-06-12 21:33:17,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-12 21:33:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-06-12 21:33:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-12 21:33:17,667 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-12 21:33:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:17,667 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-12 21:33:17,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-12 21:33:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:17,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:17,669 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:17,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:17,885 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:17,885 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-06-12 21:33:17,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:17,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501450863] [2021-06-12 21:33:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:18,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501450863] [2021-06-12 21:33:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501450863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803334522] [2021-06-12 21:33:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:18,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803334522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:18,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:18,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:18,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292742538] [2021-06-12 21:33:18,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:18,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:18,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:18,413 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:18,759 INFO L93 Difference]: Finished difference Result 1017 states and 4451 transitions. [2021-06-12 21:33:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:18,761 INFO L225 Difference]: With dead ends: 1017 [2021-06-12 21:33:18,761 INFO L226 Difference]: Without dead ends: 1008 [2021-06-12 21:33:18,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-12 21:33:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-06-12 21:33:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-12 21:33:18,774 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-12 21:33:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:18,774 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-12 21:33:18,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-12 21:33:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:18,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:18,775 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:18,976 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-06-12 21:33:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:18,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065695019] [2021-06-12 21:33:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:19,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:19,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065695019] [2021-06-12 21:33:19,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065695019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:19,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265403909] [2021-06-12 21:33:19,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:19,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:33:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:19,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:19,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:19,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:19,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:19,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-12 21:33:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:19,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265403909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:19,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:19,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-12 21:33:19,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142426267] [2021-06-12 21:33:19,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:33:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:33:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:33:19,558 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:19,853 INFO L93 Difference]: Finished difference Result 2052 states and 8564 transitions. [2021-06-12 21:33:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:33:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:19,857 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 21:33:19,857 INFO L226 Difference]: Without dead ends: 2008 [2021-06-12 21:33:19,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-12 21:33:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-06-12 21:33:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 4.634984025559105) internal successors, (5803), 1252 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-06-12 21:33:19,881 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-06-12 21:33:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:19,881 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-06-12 21:33:19,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-06-12 21:33:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:19,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:19,883 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:20,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-12 21:33:20,083 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-06-12 21:33:20,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:20,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554717062] [2021-06-12 21:33:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:20,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554717062] [2021-06-12 21:33:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554717062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359251648] [2021-06-12 21:33:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:20,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:33:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:20,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359251648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:20,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:20,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:20,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339138812] [2021-06-12 21:33:20,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:20,758 INFO L87 Difference]: Start difference. First operand 1253 states and 5803 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:21,054 INFO L93 Difference]: Finished difference Result 1300 states and 5927 transitions. [2021-06-12 21:33:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:21,056 INFO L225 Difference]: With dead ends: 1300 [2021-06-12 21:33:21,056 INFO L226 Difference]: Without dead ends: 1285 [2021-06-12 21:33:21,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-12 21:33:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-06-12 21:33:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 4.629777070063694) internal successors, (5815), 1256 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-06-12 21:33:21,073 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-06-12 21:33:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:21,073 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-06-12 21:33:21,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-06-12 21:33:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:21,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:21,075 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:21,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:21,275 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-06-12 21:33:21,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:21,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173325223] [2021-06-12 21:33:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173325223] [2021-06-12 21:33:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173325223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244796980] [2021-06-12 21:33:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:21,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:33:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:21,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:21,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:21,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:21,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:21,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:21,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-12 21:33:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244796980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:21,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:21,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 21:33:21,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611691741] [2021-06-12 21:33:21,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:33:21,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:33:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:33:21,722 INFO L87 Difference]: Start difference. First operand 1257 states and 5815 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:21,982 INFO L93 Difference]: Finished difference Result 1292 states and 5884 transitions. [2021-06-12 21:33:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:33:21,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:21,985 INFO L225 Difference]: With dead ends: 1292 [2021-06-12 21:33:21,985 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 21:33:21,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:33:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 21:33:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-06-12 21:33:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 4.6256) internal successors, (5782), 1250 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-06-12 21:33:22,003 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-06-12 21:33:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:22,003 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-06-12 21:33:22,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-06-12 21:33:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:22,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:22,005 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:22,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-12 21:33:22,205 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-06-12 21:33:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:22,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000045909] [2021-06-12 21:33:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:22,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000045909] [2021-06-12 21:33:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000045909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133184489] [2021-06-12 21:33:22,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:22,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:33:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:22,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133184489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:22,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:22,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246649582] [2021-06-12 21:33:22,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:22,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:22,863 INFO L87 Difference]: Start difference. First operand 1251 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:23,148 INFO L93 Difference]: Finished difference Result 1290 states and 5886 transitions. [2021-06-12 21:33:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:23,150 INFO L225 Difference]: With dead ends: 1290 [2021-06-12 21:33:23,150 INFO L226 Difference]: Without dead ends: 1275 [2021-06-12 21:33:23,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-12 21:33:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-06-12 21:33:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 4.6306089743589745) internal successors, (5779), 1248 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-06-12 21:33:23,166 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-06-12 21:33:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:23,166 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-06-12 21:33:23,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-06-12 21:33:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:23,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:23,168 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:23,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:23,369 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-06-12 21:33:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:23,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443354772] [2021-06-12 21:33:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:23,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443354772] [2021-06-12 21:33:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443354772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773793499] [2021-06-12 21:33:23,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:23,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:24,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773793499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:24,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:24,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:24,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228367852] [2021-06-12 21:33:24,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:24,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:24,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:24,065 INFO L87 Difference]: Start difference. First operand 1249 states and 5779 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:24,407 INFO L93 Difference]: Finished difference Result 1291 states and 5884 transitions. [2021-06-12 21:33:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:24,409 INFO L225 Difference]: With dead ends: 1291 [2021-06-12 21:33:24,409 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 21:33:24,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 21:33:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-06-12 21:33:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 4.642453591606134) internal successors, (5752), 1239 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-06-12 21:33:24,425 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-06-12 21:33:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:24,425 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-06-12 21:33:24,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-06-12 21:33:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:24,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:24,426 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:24,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-12 21:33:24,627 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-06-12 21:33:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:24,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768466253] [2021-06-12 21:33:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768466253] [2021-06-12 21:33:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768466253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757041284] [2021-06-12 21:33:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757041284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:25,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:25,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149787413] [2021-06-12 21:33:25,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:25,346 INFO L87 Difference]: Start difference. First operand 1240 states and 5752 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:25,841 INFO L93 Difference]: Finished difference Result 1276 states and 5860 transitions. [2021-06-12 21:33:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:25,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:25,843 INFO L225 Difference]: With dead ends: 1276 [2021-06-12 21:33:25,843 INFO L226 Difference]: Without dead ends: 1267 [2021-06-12 21:33:25,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:33:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-12 21:33:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-06-12 21:33:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.662866449511401) internal successors, (5726), 1228 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-06-12 21:33:25,858 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-06-12 21:33:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:25,858 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-06-12 21:33:25,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-06-12 21:33:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:25,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:25,860 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:26,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 21:33:26,065 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-06-12 21:33:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:26,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886518471] [2021-06-12 21:33:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:26,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:26,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886518471] [2021-06-12 21:33:26,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886518471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:26,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55308274] [2021-06-12 21:33:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:26,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:26,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:26,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55308274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:26,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:26,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519135124] [2021-06-12 21:33:26,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:26,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:26,866 INFO L87 Difference]: Start difference. First operand 1229 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:27,305 INFO L93 Difference]: Finished difference Result 1274 states and 5850 transitions. [2021-06-12 21:33:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:27,307 INFO L225 Difference]: With dead ends: 1274 [2021-06-12 21:33:27,308 INFO L226 Difference]: Without dead ends: 1265 [2021-06-12 21:33:27,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-12 21:33:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-06-12 21:33:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 4.677049180327868) internal successors, (5706), 1220 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-06-12 21:33:27,324 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-06-12 21:33:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:27,324 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-06-12 21:33:27,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-06-12 21:33:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:33:27,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:27,326 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:27,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-12 21:33:27,549 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-06-12 21:33:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:27,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633508492] [2021-06-12 21:33:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:27,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633508492] [2021-06-12 21:33:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633508492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785664991] [2021-06-12 21:33:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:27,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:33:27,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:27,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:28,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785664991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:28,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:28,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:33:28,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391374412] [2021-06-12 21:33:28,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:28,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:28,358 INFO L87 Difference]: Start difference. First operand 1221 states and 5706 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:28,850 INFO L93 Difference]: Finished difference Result 1266 states and 5830 transitions. [2021-06-12 21:33:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:33:28,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 21:33:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:28,853 INFO L225 Difference]: With dead ends: 1266 [2021-06-12 21:33:28,853 INFO L226 Difference]: Without dead ends: 1257 [2021-06-12 21:33:28,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 925.3ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-12 21:33:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-06-12 21:33:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 4.70216306156406) internal successors, (5652), 1202 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-06-12 21:33:28,870 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-06-12 21:33:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:28,871 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-06-12 21:33:28,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-06-12 21:33:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:28,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:28,872 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:29,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:29,073 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-06-12 21:33:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:29,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458339244] [2021-06-12 21:33:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458339244] [2021-06-12 21:33:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458339244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399884837] [2021-06-12 21:33:29,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:29,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:33:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:29,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:29,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:29,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:29,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:29,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:29,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:33:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:29,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399884837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:29,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:29,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-12 21:33:29,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862576935] [2021-06-12 21:33:29,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:33:29,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:33:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:33:29,603 INFO L87 Difference]: Start difference. First operand 1203 states and 5652 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:29,893 INFO L93 Difference]: Finished difference Result 1400 states and 6258 transitions. [2021-06-12 21:33:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:29,895 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 21:33:29,895 INFO L226 Difference]: Without dead ends: 1391 [2021-06-12 21:33:29,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-12 21:33:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-06-12 21:33:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.676090468497577) internal successors, (5789), 1238 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-06-12 21:33:29,912 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-06-12 21:33:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:29,912 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-06-12 21:33:29,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-06-12 21:33:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:29,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:29,914 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:30,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:30,131 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-06-12 21:33:30,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:30,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198080490] [2021-06-12 21:33:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:30,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:30,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198080490] [2021-06-12 21:33:30,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198080490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:30,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425169066] [2021-06-12 21:33:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:30,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:33:30,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:33:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:30,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425169066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:30,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:30,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:30,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335402349] [2021-06-12 21:33:30,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:30,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:30,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:30,943 INFO L87 Difference]: Start difference. First operand 1239 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:31,168 INFO L93 Difference]: Finished difference Result 1286 states and 5928 transitions. [2021-06-12 21:33:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:31,171 INFO L225 Difference]: With dead ends: 1286 [2021-06-12 21:33:31,171 INFO L226 Difference]: Without dead ends: 1278 [2021-06-12 21:33:31,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 698.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-12 21:33:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-06-12 21:33:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 4.674698795180723) internal successors, (5820), 1245 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-06-12 21:33:31,186 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-06-12 21:33:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:31,187 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-06-12 21:33:31,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-06-12 21:33:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:31,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:31,188 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:31,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:31,389 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-06-12 21:33:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:31,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72927618] [2021-06-12 21:33:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:31,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72927618] [2021-06-12 21:33:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72927618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044169847] [2021-06-12 21:33:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:31,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:31,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:31,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:31,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:31,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:31,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:31,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:31,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-12 21:33:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:32,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044169847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:32,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:32,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:33:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878658644] [2021-06-12 21:33:32,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:33:32,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:33:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:33:32,043 INFO L87 Difference]: Start difference. First operand 1246 states and 5820 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:32,536 INFO L93 Difference]: Finished difference Result 1353 states and 6064 transitions. [2021-06-12 21:33:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:32,536 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:32,539 INFO L225 Difference]: With dead ends: 1353 [2021-06-12 21:33:32,539 INFO L226 Difference]: Without dead ends: 1341 [2021-06-12 21:33:32,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-12 21:33:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-06-12 21:33:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 4.657303370786517) internal successors, (5803), 1246 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-06-12 21:33:32,557 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-06-12 21:33:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:32,557 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-06-12 21:33:32,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-06-12 21:33:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:32,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:32,558 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:32,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:32,760 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-06-12 21:33:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:32,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357911523] [2021-06-12 21:33:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:32,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:32,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357911523] [2021-06-12 21:33:32,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357911523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:32,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617146289] [2021-06-12 21:33:32,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:33:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:33,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:33,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:33,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:33,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:33,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:33,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:33,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:33:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:33:33,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617146289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:33,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:33,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-12 21:33:33,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592412395] [2021-06-12 21:33:33,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:33:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:33:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:33:33,231 INFO L87 Difference]: Start difference. First operand 1247 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:33,641 INFO L93 Difference]: Finished difference Result 2674 states and 11664 transitions. [2021-06-12 21:33:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:33:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:33,652 INFO L225 Difference]: With dead ends: 2674 [2021-06-12 21:33:33,653 INFO L226 Difference]: Without dead ends: 2633 [2021-06-12 21:33:33,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:33:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-12 21:33:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-06-12 21:33:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.881949210706932) internal successors, (7113), 1457 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-06-12 21:33:33,679 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-06-12 21:33:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:33,679 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-06-12 21:33:33,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-06-12 21:33:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:33,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:33,681 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:33,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-12 21:33:33,882 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-06-12 21:33:33,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:33,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166860544] [2021-06-12 21:33:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:34,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:34,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166860544] [2021-06-12 21:33:34,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166860544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:34,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719954379] [2021-06-12 21:33:34,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:34,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:34,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719954379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:34,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:34,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:34,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431925766] [2021-06-12 21:33:34,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:34,783 INFO L87 Difference]: Start difference. First operand 1458 states and 7113 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:35,366 INFO L93 Difference]: Finished difference Result 1507 states and 7259 transitions. [2021-06-12 21:33:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:33:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:35,369 INFO L225 Difference]: With dead ends: 1507 [2021-06-12 21:33:35,369 INFO L226 Difference]: Without dead ends: 1499 [2021-06-12 21:33:35,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 964.0ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:33:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-06-12 21:33:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-06-12 21:33:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 4.885538039753255) internal successors, (7128), 1459 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-06-12 21:33:35,388 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-06-12 21:33:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:35,388 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-06-12 21:33:35,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-06-12 21:33:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:35,391 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:35,391 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:35,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 21:33:35,595 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:35,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-06-12 21:33:35,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:35,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250307750] [2021-06-12 21:33:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:35,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:35,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250307750] [2021-06-12 21:33:35,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250307750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:35,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595854432] [2021-06-12 21:33:35,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:35,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:33:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:36,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595854432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:36,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:36,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:36,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021069426] [2021-06-12 21:33:36,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:36,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:36,465 INFO L87 Difference]: Start difference. First operand 1460 states and 7128 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:36,950 INFO L93 Difference]: Finished difference Result 1520 states and 7319 transitions. [2021-06-12 21:33:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:36,954 INFO L225 Difference]: With dead ends: 1520 [2021-06-12 21:33:36,954 INFO L226 Difference]: Without dead ends: 1515 [2021-06-12 21:33:36,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:33:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-12 21:33:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-06-12 21:33:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 4.8756830601092895) internal successors, (7138), 1464 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-06-12 21:33:36,978 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-06-12 21:33:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:36,978 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-06-12 21:33:36,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-06-12 21:33:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:36,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:36,981 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:37,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:37,198 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-06-12 21:33:37,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:37,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141956496] [2021-06-12 21:33:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:37,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141956496] [2021-06-12 21:33:37,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141956496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142676029] [2021-06-12 21:33:37,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:37,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:33:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:37,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:37,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:37,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:37,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:37,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:37,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-06-12 21:33:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:37,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142676029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:37,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:37,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:33:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848914742] [2021-06-12 21:33:37,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:33:37,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:33:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:33:37,646 INFO L87 Difference]: Start difference. First operand 1465 states and 7138 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,880 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 21:33:45,973 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-12 21:33:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:50,117 INFO L93 Difference]: Finished difference Result 1793 states and 8258 transitions. [2021-06-12 21:33:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:33:50,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:50,120 INFO L225 Difference]: With dead ends: 1793 [2021-06-12 21:33:50,120 INFO L226 Difference]: Without dead ends: 1777 [2021-06-12 21:33:50,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 8579.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:50,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-12 21:33:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1513. [2021-06-12 21:33:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 4.866402116402116) internal successors, (7358), 1512 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-06-12 21:33:50,142 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-06-12 21:33:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:50,142 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-06-12 21:33:50,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-06-12 21:33:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:50,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:50,144 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:50,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 21:33:50,361 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-06-12 21:33:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:50,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596380634] [2021-06-12 21:33:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:50,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:50,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596380634] [2021-06-12 21:33:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596380634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:50,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113720279] [2021-06-12 21:33:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:50,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:33:50,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:50,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:50,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:50,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:50,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:51,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 21:33:51,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-12 21:33:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113720279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:33:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268927430] [2021-06-12 21:33:51,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:33:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:33:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:33:51,315 INFO L87 Difference]: Start difference. First operand 1513 states and 7358 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,685 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-06-12 21:33:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:51,716 INFO L93 Difference]: Finished difference Result 1848 states and 7788 transitions. [2021-06-12 21:33:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:51,719 INFO L225 Difference]: With dead ends: 1848 [2021-06-12 21:33:51,719 INFO L226 Difference]: Without dead ends: 1812 [2021-06-12 21:33:51,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-12 21:33:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-06-12 21:33:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.560519902518278) internal successors, (5614), 1231 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-06-12 21:33:51,740 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-06-12 21:33:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:51,740 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-06-12 21:33:51,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-06-12 21:33:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:51,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:51,742 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:51,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:51,942 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-06-12 21:33:51,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:51,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887551908] [2021-06-12 21:33:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:52,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:52,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887551908] [2021-06-12 21:33:52,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887551908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:52,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860236119] [2021-06-12 21:33:52,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:52,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:52,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:52,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860236119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:52,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:52,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674297033] [2021-06-12 21:33:52,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:52,614 INFO L87 Difference]: Start difference. First operand 1232 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:52,938 INFO L93 Difference]: Finished difference Result 1287 states and 5773 transitions. [2021-06-12 21:33:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:52,941 INFO L225 Difference]: With dead ends: 1287 [2021-06-12 21:33:52,941 INFO L226 Difference]: Without dead ends: 1279 [2021-06-12 21:33:52,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-12 21:33:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-06-12 21:33:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.556809024979855) internal successors, (5655), 1241 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-06-12 21:33:52,957 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-06-12 21:33:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:52,957 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-06-12 21:33:52,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-06-12 21:33:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:52,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:52,959 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:53,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 21:33:53,161 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-06-12 21:33:53,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:53,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922817834] [2021-06-12 21:33:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:53,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922817834] [2021-06-12 21:33:53,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922817834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:53,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658350678] [2021-06-12 21:33:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:33:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:53,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:33:53,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:53,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:53,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:33:53,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:33:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658350678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:53,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:53,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-12 21:33:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115958292] [2021-06-12 21:33:53,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:33:53,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:33:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:33:53,655 INFO L87 Difference]: Start difference. First operand 1242 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:54,035 INFO L93 Difference]: Finished difference Result 1370 states and 6000 transitions. [2021-06-12 21:33:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:33:54,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:54,037 INFO L225 Difference]: With dead ends: 1370 [2021-06-12 21:33:54,038 INFO L226 Difference]: Without dead ends: 1358 [2021-06-12 21:33:54,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:33:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-12 21:33:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-06-12 21:33:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 4.54066985645933) internal successors, (5694), 1254 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-06-12 21:33:54,055 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-06-12 21:33:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:54,055 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-06-12 21:33:54,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-06-12 21:33:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:54,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:54,057 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:54,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:54,261 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-06-12 21:33:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:54,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104977583] [2021-06-12 21:33:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104977583] [2021-06-12 21:33:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104977583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375215500] [2021-06-12 21:33:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:54,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:55,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375215500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:55,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:55,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136583335] [2021-06-12 21:33:55,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:55,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:55,077 INFO L87 Difference]: Start difference. First operand 1255 states and 5694 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:55,412 INFO L93 Difference]: Finished difference Result 1289 states and 5778 transitions. [2021-06-12 21:33:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:55,415 INFO L225 Difference]: With dead ends: 1289 [2021-06-12 21:33:55,415 INFO L226 Difference]: Without dead ends: 1277 [2021-06-12 21:33:55,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-12 21:33:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-06-12 21:33:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 4.545163868904876) internal successors, (5686), 1251 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-06-12 21:33:55,431 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-06-12 21:33:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:55,431 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-06-12 21:33:55,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-06-12 21:33:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:55,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:55,433 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:55,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-12 21:33:55,634 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-06-12 21:33:55,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:55,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866397500] [2021-06-12 21:33:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:55,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:55,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866397500] [2021-06-12 21:33:55,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866397500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:55,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859356196] [2021-06-12 21:33:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:55,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:33:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:33:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859356196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:56,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:56,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108468102] [2021-06-12 21:33:56,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:56,513 INFO L87 Difference]: Start difference. First operand 1252 states and 5686 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:56,878 INFO L93 Difference]: Finished difference Result 1295 states and 5809 transitions. [2021-06-12 21:33:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:33:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:56,881 INFO L225 Difference]: With dead ends: 1295 [2021-06-12 21:33:56,881 INFO L226 Difference]: Without dead ends: 1287 [2021-06-12 21:33:56,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 864.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-12 21:33:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-06-12 21:33:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 4.5474860335195535) internal successors, (5698), 1253 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-06-12 21:33:56,896 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-06-12 21:33:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:56,896 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-06-12 21:33:56,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-06-12 21:33:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:56,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:56,898 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:57,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:57,099 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-06-12 21:33:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:57,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861492328] [2021-06-12 21:33:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:57,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:57,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861492328] [2021-06-12 21:33:57,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861492328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:57,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135962838] [2021-06-12 21:33:57,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:57,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:33:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:57,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135962838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:57,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:57,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094577453] [2021-06-12 21:33:57,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:57,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:57,937 INFO L87 Difference]: Start difference. First operand 1254 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:58,217 INFO L93 Difference]: Finished difference Result 1301 states and 5846 transitions. [2021-06-12 21:33:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:33:58,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:58,219 INFO L225 Difference]: With dead ends: 1301 [2021-06-12 21:33:58,219 INFO L226 Difference]: Without dead ends: 1296 [2021-06-12 21:33:58,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 806.5ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-12 21:33:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-06-12 21:33:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.551641313050441) internal successors, (5685), 1249 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-06-12 21:33:58,235 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-06-12 21:33:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:58,235 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-06-12 21:33:58,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-06-12 21:33:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:58,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:58,237 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:58,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 21:33:58,438 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-06-12 21:33:58,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:58,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776633946] [2021-06-12 21:33:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:58,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:58,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776633946] [2021-06-12 21:33:58,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776633946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:58,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495086799] [2021-06-12 21:33:58,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:58,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:33:58,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:33:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:59,082 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 21:33:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495086799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:59,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:59,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:33:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199561131] [2021-06-12 21:33:59,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:59,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:59,269 INFO L87 Difference]: Start difference. First operand 1250 states and 5685 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:59,579 INFO L93 Difference]: Finished difference Result 1389 states and 6092 transitions. [2021-06-12 21:33:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:33:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:59,581 INFO L225 Difference]: With dead ends: 1389 [2021-06-12 21:33:59,582 INFO L226 Difference]: Without dead ends: 1381 [2021-06-12 21:33:59,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 748.8ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-12 21:33:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-06-12 21:33:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 4.563607085346216) internal successors, (5668), 1242 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-06-12 21:33:59,599 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-06-12 21:33:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:59,599 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-06-12 21:33:59,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-06-12 21:33:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:59,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:59,601 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:59,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 21:33:59,801 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-06-12 21:33:59,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:59,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924838660] [2021-06-12 21:33:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:59,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924838660] [2021-06-12 21:33:59,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924838660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352649854] [2021-06-12 21:33:59,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:59,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:33:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:00,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:00,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:00,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,481 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-12 21:34:00,482 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-06-12 21:34:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:00,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:00,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,555 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-06-12 21:34:00,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:34:00,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-06-12 21:34:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:00,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352649854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:00,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:00,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:34:00,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965771891] [2021-06-12 21:34:00,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:34:00,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:00,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:34:00,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:34:00,656 INFO L87 Difference]: Start difference. First operand 1243 states and 5668 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:01,074 INFO L93 Difference]: Finished difference Result 1300 states and 5767 transitions. [2021-06-12 21:34:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:34:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:01,077 INFO L225 Difference]: With dead ends: 1300 [2021-06-12 21:34:01,077 INFO L226 Difference]: Without dead ends: 1284 [2021-06-12 21:34:01,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:34:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-12 21:34:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-06-12 21:34:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.554119547657512) internal successors, (5638), 1238 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-06-12 21:34:01,092 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-06-12 21:34:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:01,092 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-06-12 21:34:01,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-06-12 21:34:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:01,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:01,094 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:01,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:01,302 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-06-12 21:34:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:01,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499645016] [2021-06-12 21:34:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:01,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:01,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499645016] [2021-06-12 21:34:01,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499645016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:01,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791846586] [2021-06-12 21:34:01,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:01,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:34:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:01,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:01,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:01,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:01,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:34:01,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:34:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:01,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791846586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:01,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:01,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-12 21:34:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326814741] [2021-06-12 21:34:01,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:34:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:34:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:34:01,790 INFO L87 Difference]: Start difference. First operand 1239 states and 5638 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:02,029 INFO L93 Difference]: Finished difference Result 1002 states and 4294 transitions. [2021-06-12 21:34:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:34:02,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:02,031 INFO L225 Difference]: With dead ends: 1002 [2021-06-12 21:34:02,031 INFO L226 Difference]: Without dead ends: 994 [2021-06-12 21:34:02,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-12 21:34:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-06-12 21:34:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.34737923946557) internal successors, (4230), 973 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-06-12 21:34:02,042 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-06-12 21:34:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:02,042 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-06-12 21:34:02,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-06-12 21:34:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:02,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:02,044 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:02,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:02,245 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-06-12 21:34:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918276339] [2021-06-12 21:34:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:02,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918276339] [2021-06-12 21:34:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918276339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758336121] [2021-06-12 21:34:02,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:34:02,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758336121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:03,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:03,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936598379] [2021-06-12 21:34:03,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:03,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:03,136 INFO L87 Difference]: Start difference. First operand 974 states and 4230 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:03,791 INFO L93 Difference]: Finished difference Result 1025 states and 4377 transitions. [2021-06-12 21:34:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:34:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:03,793 INFO L225 Difference]: With dead ends: 1025 [2021-06-12 21:34:03,793 INFO L226 Difference]: Without dead ends: 1017 [2021-06-12 21:34:03,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1143.5ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:34:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-12 21:34:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-06-12 21:34:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 4.336040609137056) internal successors, (4271), 985 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-06-12 21:34:03,806 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-06-12 21:34:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:03,807 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-06-12 21:34:03,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-06-12 21:34:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:03,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:03,808 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:04,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:04,009 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-06-12 21:34:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044448413] [2021-06-12 21:34:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:04,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044448413] [2021-06-12 21:34:04,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044448413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565411780] [2021-06-12 21:34:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:04,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:34:04,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:34:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:04,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565411780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:04,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:04,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159166419] [2021-06-12 21:34:04,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:04,816 INFO L87 Difference]: Start difference. First operand 986 states and 4271 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:05,112 INFO L93 Difference]: Finished difference Result 1033 states and 4401 transitions. [2021-06-12 21:34:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:34:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:05,114 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 21:34:05,114 INFO L226 Difference]: Without dead ends: 1025 [2021-06-12 21:34:05,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 795.9ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:34:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-12 21:34:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-06-12 21:34:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 4.354209445585216) internal successors, (4241), 974 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-06-12 21:34:05,125 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-06-12 21:34:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:05,126 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-06-12 21:34:05,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-06-12 21:34:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:05,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:05,127 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:05,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 21:34:05,327 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-06-12 21:34:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944975887] [2021-06-12 21:34:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:05,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:05,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944975887] [2021-06-12 21:34:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944975887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:05,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339879372] [2021-06-12 21:34:05,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:05,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:05,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:34:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339879372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:06,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:06,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539196961] [2021-06-12 21:34:06,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:06,228 INFO L87 Difference]: Start difference. First operand 975 states and 4241 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:06,572 INFO L93 Difference]: Finished difference Result 1021 states and 4369 transitions. [2021-06-12 21:34:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:34:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:06,574 INFO L225 Difference]: With dead ends: 1021 [2021-06-12 21:34:06,574 INFO L226 Difference]: Without dead ends: 1013 [2021-06-12 21:34:06,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:34:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-12 21:34:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-06-12 21:34:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.362795477903392) internal successors, (4245), 973 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-06-12 21:34:06,586 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-06-12 21:34:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-06-12 21:34:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-06-12 21:34:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:06,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:06,587 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:06,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-12 21:34:06,788 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-06-12 21:34:06,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:06,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934005152] [2021-06-12 21:34:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:06,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934005152] [2021-06-12 21:34:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934005152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338375232] [2021-06-12 21:34:06,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:06,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:34:06,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:34:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:07,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:07,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:07,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:07,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:07,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:34:07,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-12 21:34:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:07,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338375232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:07,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:07,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:34:07,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396429546] [2021-06-12 21:34:07,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:34:07,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:34:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:34:07,631 INFO L87 Difference]: Start difference. First operand 974 states and 4245 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:07,741 INFO L93 Difference]: Finished difference Result 995 states and 4253 transitions. [2021-06-12 21:34:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:34:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:07,743 INFO L225 Difference]: With dead ends: 995 [2021-06-12 21:34:07,743 INFO L226 Difference]: Without dead ends: 985 [2021-06-12 21:34:07,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:34:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-12 21:34:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-06-12 21:34:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.353430353430354) internal successors, (4188), 962 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-06-12 21:34:07,755 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-06-12 21:34:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-06-12 21:34:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-06-12 21:34:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:07,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:07,756 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:07,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 21:34:07,957 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-06-12 21:34:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:07,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347648364] [2021-06-12 21:34:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:08,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347648364] [2021-06-12 21:34:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347648364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808543137] [2021-06-12 21:34:08,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:08,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:34:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:34:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:08,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808543137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:08,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:08,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:08,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571018843] [2021-06-12 21:34:08,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:08,657 INFO L87 Difference]: Start difference. First operand 963 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:08,917 INFO L93 Difference]: Finished difference Result 1008 states and 4333 transitions. [2021-06-12 21:34:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:34:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:08,919 INFO L225 Difference]: With dead ends: 1008 [2021-06-12 21:34:08,919 INFO L226 Difference]: Without dead ends: 1003 [2021-06-12 21:34:08,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 649.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:34:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-12 21:34:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-06-12 21:34:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 4.348547717842323) internal successors, (4192), 964 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-06-12 21:34:08,931 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-06-12 21:34:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:08,931 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-06-12 21:34:08,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-06-12 21:34:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:08,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:08,932 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:09,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 21:34:09,133 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-06-12 21:34:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:09,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729636172] [2021-06-12 21:34:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:09,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:09,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729636172] [2021-06-12 21:34:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729636172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:09,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146082115] [2021-06-12 21:34:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:34:09,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146082115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:10,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:10,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:10,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660204681] [2021-06-12 21:34:10,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:10,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:10,021 INFO L87 Difference]: Start difference. First operand 965 states and 4192 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:10,602 INFO L93 Difference]: Finished difference Result 1251 states and 5174 transitions. [2021-06-12 21:34:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:34:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:34:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:10,605 INFO L225 Difference]: With dead ends: 1251 [2021-06-12 21:34:10,605 INFO L226 Difference]: Without dead ends: 1222 [2021-06-12 21:34:10,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:34:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-12 21:34:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-06-12 21:34:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 4.33719806763285) internal successors, (4489), 1035 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-06-12 21:34:10,627 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-06-12 21:34:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:10,627 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-06-12 21:34:10,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-06-12 21:34:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:34:10,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:10,628 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:10,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 21:34:10,829 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-06-12 21:34:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:10,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548971576] [2021-06-12 21:34:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:10,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:10,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548971576] [2021-06-12 21:34:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548971576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:10,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498967718] [2021-06-12 21:34:10,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:11,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:11,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:34:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:11,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:11,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:11,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:11,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:34:11,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:11,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 21:34:11,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-12 21:35:26,607 WARN L205 SmtUtils]: Spent 1.25 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-12 21:35:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498967718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:26,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:26,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:35:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810131523] [2021-06-12 21:35:26,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:26,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:26,734 INFO L87 Difference]: Start difference. First operand 1036 states and 4489 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,661 WARN L205 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-12 21:36:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:27,715 INFO L93 Difference]: Finished difference Result 1372 states and 5445 transitions. [2021-06-12 21:36:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:36:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:27,718 INFO L225 Difference]: With dead ends: 1372 [2021-06-12 21:36:27,718 INFO L226 Difference]: Without dead ends: 1354 [2021-06-12 21:36:27,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 136139.0ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-12 21:36:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-06-12 21:36:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.269906928645295) internal successors, (4129), 967 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-06-12 21:36:27,731 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-06-12 21:36:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:27,731 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-06-12 21:36:27,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-06-12 21:36:27,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:27,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:27,732 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:27,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-12 21:36:27,933 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-06-12 21:36:27,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:27,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505143474] [2021-06-12 21:36:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:28,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:28,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505143474] [2021-06-12 21:36:28,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505143474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:28,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028359874] [2021-06-12 21:36:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:36:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:36:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:28,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028359874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:28,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:28,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:36:28,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276271286] [2021-06-12 21:36:28,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:36:28,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:36:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:36:28,774 INFO L87 Difference]: Start difference. First operand 968 states and 4129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:29,094 INFO L93 Difference]: Finished difference Result 1031 states and 4316 transitions. [2021-06-12 21:36:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:36:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:29,096 INFO L225 Difference]: With dead ends: 1031 [2021-06-12 21:36:29,097 INFO L226 Difference]: Without dead ends: 1023 [2021-06-12 21:36:29,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:36:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-12 21:36:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-06-12 21:36:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 4.259183673469388) internal successors, (4174), 980 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-06-12 21:36:29,108 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-06-12 21:36:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:29,108 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-06-12 21:36:29,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-06-12 21:36:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:29,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:29,109 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:29,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-12 21:36:29,310 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:29,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-06-12 21:36:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:29,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359063881] [2021-06-12 21:36:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:29,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:29,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359063881] [2021-06-12 21:36:29,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359063881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:29,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253200895] [2021-06-12 21:36:29,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:29,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:29,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:29,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:36:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:29,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:29,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:29,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:29,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:36:29,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-12 21:36:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:29,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253200895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:29,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:29,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-12 21:36:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288039673] [2021-06-12 21:36:29,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:36:29,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:36:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:36:29,888 INFO L87 Difference]: Start difference. First operand 981 states and 4174 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:34,252 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-12 21:36:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:36,329 INFO L93 Difference]: Finished difference Result 1004 states and 4211 transitions. [2021-06-12 21:36:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:36:36,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:36,331 INFO L225 Difference]: With dead ends: 1004 [2021-06-12 21:36:36,331 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 21:36:36,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4619.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:36:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 21:36:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 972. [2021-06-12 21:36:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.25643666323378) internal successors, (4133), 971 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-06-12 21:36:36,342 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-06-12 21:36:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:36,342 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-06-12 21:36:36,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-06-12 21:36:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:36,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:36,344 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:36,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 21:36:36,544 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-06-12 21:36:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:36,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295898090] [2021-06-12 21:36:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:36,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:36,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295898090] [2021-06-12 21:36:36,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295898090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:36,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234101826] [2021-06-12 21:36:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:36,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:36:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:36:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234101826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:37,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:37,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:36:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173197681] [2021-06-12 21:36:37,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:36:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:36:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:36:37,255 INFO L87 Difference]: Start difference. First operand 972 states and 4133 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:37,524 INFO L93 Difference]: Finished difference Result 1074 states and 4467 transitions. [2021-06-12 21:36:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:36:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:37,526 INFO L225 Difference]: With dead ends: 1074 [2021-06-12 21:36:37,526 INFO L226 Difference]: Without dead ends: 1064 [2021-06-12 21:36:37,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-12 21:36:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-06-12 21:36:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.235707121364093) internal successors, (4223), 997 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-06-12 21:36:37,537 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-06-12 21:36:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:37,538 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-06-12 21:36:37,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-06-12 21:36:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:37,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:37,539 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:37,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:37,739 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:37,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-06-12 21:36:37,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:37,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205809727] [2021-06-12 21:36:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:37,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:37,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205809727] [2021-06-12 21:36:37,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205809727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:37,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224637951] [2021-06-12 21:36:37,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:37,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:36:37,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:36:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:38,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:38,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:38,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:38,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:38,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:38,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:36:38,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-06-12 21:36:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224637951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-06-12 21:36:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965441758] [2021-06-12 21:36:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:36:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:36:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:36:38,477 INFO L87 Difference]: Start difference. First operand 998 states and 4223 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:38,726 INFO L93 Difference]: Finished difference Result 1103 states and 4427 transitions. [2021-06-12 21:36:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:36:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:38,728 INFO L225 Difference]: With dead ends: 1103 [2021-06-12 21:36:38,729 INFO L226 Difference]: Without dead ends: 1087 [2021-06-12 21:36:38,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:36:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-12 21:36:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-06-12 21:36:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-12 21:36:38,741 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-12 21:36:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:38,741 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-12 21:36:38,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-12 21:36:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:38,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:38,742 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:38,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:38,943 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-06-12 21:36:38,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:38,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979552321] [2021-06-12 21:36:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:39,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:39,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979552321] [2021-06-12 21:36:39,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979552321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:39,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588767336] [2021-06-12 21:36:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588767336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:36:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800387976] [2021-06-12 21:36:39,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:36:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:36:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:36:39,685 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:39,931 INFO L93 Difference]: Finished difference Result 1059 states and 4372 transitions. [2021-06-12 21:36:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:36:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:36:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:39,933 INFO L225 Difference]: With dead ends: 1059 [2021-06-12 21:36:39,933 INFO L226 Difference]: Without dead ends: 1051 [2021-06-12 21:36:39,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:36:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-12 21:36:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-06-12 21:36:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-12 21:36:39,945 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-12 21:36:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:39,945 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-12 21:36:39,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-12 21:36:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:36:39,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:39,947 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 21:36:40,147 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-06-12 21:36:40,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090812002] [2021-06-12 21:36:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:40,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:40,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090812002] [2021-06-12 21:36:40,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090812002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:40,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395737307] [2021-06-12 21:36:40,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:40,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:36:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:40,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:40,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:40,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:40,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:40,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:40,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:40,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:36:40,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:40,859 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 21:36:40,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:40,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-12 21:36:40,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-12 21:38:03,590 WARN L205 SmtUtils]: Spent 1.38 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-12 21:38:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:03,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395737307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:03,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:03,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 21:38:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067057531] [2021-06-12 21:38:03,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:38:03,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:38:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:38:03,671 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,484 WARN L205 SmtUtils]: Spent 1.48 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-12 21:39:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:32,579 INFO L93 Difference]: Finished difference Result 1021 states and 4224 transitions. [2021-06-12 21:39:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:39:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:32,581 INFO L225 Difference]: With dead ends: 1021 [2021-06-12 21:39:32,581 INFO L226 Difference]: Without dead ends: 1013 [2021-06-12 21:39:32,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 171799.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:39:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-12 21:39:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-06-12 21:39:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 4.202429149797571) internal successors, (4152), 988 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-06-12 21:39:32,593 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-06-12 21:39:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:32,593 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-06-12 21:39:32,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-06-12 21:39:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:32,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:32,594 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:32,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:32,797 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-06-12 21:39:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:32,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728464855] [2021-06-12 21:39:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:32,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:32,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728464855] [2021-06-12 21:39:32,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728464855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:32,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318155237] [2021-06-12 21:39:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:32,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:39:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:39:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:33,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318155237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:33,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:33,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:39:33,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904571854] [2021-06-12 21:39:33,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:39:33,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:39:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:33,510 INFO L87 Difference]: Start difference. First operand 989 states and 4152 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:33,874 INFO L93 Difference]: Finished difference Result 1036 states and 4291 transitions. [2021-06-12 21:39:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:39:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:33,877 INFO L225 Difference]: With dead ends: 1036 [2021-06-12 21:39:33,877 INFO L226 Difference]: Without dead ends: 1028 [2021-06-12 21:39:33,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:39:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-12 21:39:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-06-12 21:39:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 4.211382113821138) internal successors, (4144), 984 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-06-12 21:39:33,888 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-06-12 21:39:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:33,888 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-06-12 21:39:33,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-06-12 21:39:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:33,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:33,890 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:34,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 21:39:34,090 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-06-12 21:39:34,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:34,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006721339] [2021-06-12 21:39:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:34,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:34,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006721339] [2021-06-12 21:39:34,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006721339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:34,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056195731] [2021-06-12 21:39:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:34,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:39:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:34,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056195731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:34,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:34,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:39:34,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407904268] [2021-06-12 21:39:34,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:39:34,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:34,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:39:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:34,890 INFO L87 Difference]: Start difference. First operand 985 states and 4144 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:35,243 INFO L93 Difference]: Finished difference Result 1044 states and 4311 transitions. [2021-06-12 21:39:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:39:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:35,245 INFO L225 Difference]: With dead ends: 1044 [2021-06-12 21:39:35,245 INFO L226 Difference]: Without dead ends: 1036 [2021-06-12 21:39:35,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:39:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-12 21:39:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-06-12 21:39:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 4.214867617107943) internal successors, (4139), 982 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-06-12 21:39:35,257 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-06-12 21:39:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:35,257 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-06-12 21:39:35,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-06-12 21:39:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:35,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:35,258 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:35,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:35,459 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-06-12 21:39:35,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:35,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139131910] [2021-06-12 21:39:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:35,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:35,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139131910] [2021-06-12 21:39:35,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139131910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:35,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717027233] [2021-06-12 21:39:35,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:35,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:39:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:39:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:35,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:35,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:35,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:36,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:39:36,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-06-12 21:39:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717027233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:36,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:36,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 21:39:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346196563] [2021-06-12 21:39:36,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:39:36,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:39:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:39:36,174 INFO L87 Difference]: Start difference. First operand 983 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:36,373 INFO L93 Difference]: Finished difference Result 949 states and 3881 transitions. [2021-06-12 21:39:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:39:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:36,375 INFO L225 Difference]: With dead ends: 949 [2021-06-12 21:39:36,375 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 21:39:36,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:39:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 21:39:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-06-12 21:39:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 4.175824175824176) internal successors, (3800), 910 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-06-12 21:39:36,390 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-06-12 21:39:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:36,390 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-06-12 21:39:36,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-06-12 21:39:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:36,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:36,392 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:36,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 21:39:36,609 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-06-12 21:39:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:36,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182374814] [2021-06-12 21:39:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:36,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:36,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182374814] [2021-06-12 21:39:36,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182374814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:36,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29424005] [2021-06-12 21:39:36,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:36,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:39:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:39:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:37,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29424005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:37,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:37,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:39:37,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126034841] [2021-06-12 21:39:37,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:39:37,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:39:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:37,477 INFO L87 Difference]: Start difference. First operand 911 states and 3800 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:37,792 INFO L93 Difference]: Finished difference Result 985 states and 4052 transitions. [2021-06-12 21:39:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:39:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:37,794 INFO L225 Difference]: With dead ends: 985 [2021-06-12 21:39:37,794 INFO L226 Difference]: Without dead ends: 975 [2021-06-12 21:39:37,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:39:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-12 21:39:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-06-12 21:39:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 4.168490153172867) internal successors, (3810), 914 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-06-12 21:39:37,805 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-06-12 21:39:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:37,805 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-06-12 21:39:37,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-06-12 21:39:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:37,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:37,806 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:38,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:38,007 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:38,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-06-12 21:39:38,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:38,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049927335] [2021-06-12 21:39:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:38,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049927335] [2021-06-12 21:39:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049927335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721344752] [2021-06-12 21:39:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:39:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721344752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:38,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:39:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172137184] [2021-06-12 21:39:38,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:39:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:39:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:38,839 INFO L87 Difference]: Start difference. First operand 915 states and 3810 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:39,288 INFO L93 Difference]: Finished difference Result 958 states and 3949 transitions. [2021-06-12 21:39:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:39,290 INFO L225 Difference]: With dead ends: 958 [2021-06-12 21:39:39,290 INFO L226 Difference]: Without dead ends: 953 [2021-06-12 21:39:39,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:39:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-12 21:39:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-06-12 21:39:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.181015452538631) internal successors, (3788), 906 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-06-12 21:39:39,301 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-06-12 21:39:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:39,301 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-06-12 21:39:39,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-06-12 21:39:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:39:39,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:39,302 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:39,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:39,503 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-06-12 21:39:39,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:39,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092223821] [2021-06-12 21:39:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:39,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:39,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092223821] [2021-06-12 21:39:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092223821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:39,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976126255] [2021-06-12 21:39:39,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:39,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:39:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976126255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:40,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:40,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:39:40,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296648471] [2021-06-12 21:39:40,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:39:40,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:39:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:40,326 INFO L87 Difference]: Start difference. First operand 907 states and 3788 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:40,749 INFO L93 Difference]: Finished difference Result 954 states and 3919 transitions. [2021-06-12 21:39:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:39:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:40,751 INFO L225 Difference]: With dead ends: 954 [2021-06-12 21:39:40,751 INFO L226 Difference]: Without dead ends: 946 [2021-06-12 21:39:40,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:39:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-12 21:39:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-06-12 21:39:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 4.196868008948546) internal successors, (3752), 894 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-06-12 21:39:40,772 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-06-12 21:39:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:40,772 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-06-12 21:39:40,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-06-12 21:39:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:40,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:40,773 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:40,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-12 21:39:40,974 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-06-12 21:39:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:40,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657953391] [2021-06-12 21:39:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:41,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657953391] [2021-06-12 21:39:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657953391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744127205] [2021-06-12 21:39:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:41,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:39:41,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:39:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744127205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:41,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:41,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:39:41,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311497797] [2021-06-12 21:39:41,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:39:41,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:39:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:39:41,866 INFO L87 Difference]: Start difference. First operand 895 states and 3752 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:42,115 INFO L93 Difference]: Finished difference Result 925 states and 3819 transitions. [2021-06-12 21:39:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:42,117 INFO L225 Difference]: With dead ends: 925 [2021-06-12 21:39:42,117 INFO L226 Difference]: Without dead ends: 909 [2021-06-12 21:39:42,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:39:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-06-12 21:39:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-06-12 21:39:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.180803571428571) internal successors, (3746), 896 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-06-12 21:39:42,128 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-06-12 21:39:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-06-12 21:39:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-06-12 21:39:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:42,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:42,129 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:42,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:42,330 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-06-12 21:39:42,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:42,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414406771] [2021-06-12 21:39:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414406771] [2021-06-12 21:39:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414406771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751473874] [2021-06-12 21:39:42,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:42,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:39:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:43,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751473874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:43,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:43,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:39:43,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707408054] [2021-06-12 21:39:43,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:39:43,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:43,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:39:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:39:43,152 INFO L87 Difference]: Start difference. First operand 897 states and 3746 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:43,681 INFO L93 Difference]: Finished difference Result 922 states and 3798 transitions. [2021-06-12 21:39:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:39:43,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:43,683 INFO L225 Difference]: With dead ends: 922 [2021-06-12 21:39:43,683 INFO L226 Difference]: Without dead ends: 908 [2021-06-12 21:39:43,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:39:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-12 21:39:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-06-12 21:39:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 4.180898876404495) internal successors, (3721), 890 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-06-12 21:39:43,693 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-06-12 21:39:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:43,693 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-06-12 21:39:43,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-06-12 21:39:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:43,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:43,695 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:43,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 21:39:43,895 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-06-12 21:39:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:43,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176296211] [2021-06-12 21:39:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:44,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176296211] [2021-06-12 21:39:44,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176296211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48222253] [2021-06-12 21:39:44,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:44,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:39:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:39:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48222253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:44,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:44,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:39:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404378749] [2021-06-12 21:39:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:39:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:39:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:39:44,892 INFO L87 Difference]: Start difference. First operand 891 states and 3721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:45,219 INFO L93 Difference]: Finished difference Result 933 states and 3816 transitions. [2021-06-12 21:39:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:39:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:45,221 INFO L225 Difference]: With dead ends: 933 [2021-06-12 21:39:45,221 INFO L226 Difference]: Without dead ends: 913 [2021-06-12 21:39:45,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:39:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-12 21:39:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-06-12 21:39:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.174746335963923) internal successors, (3703), 887 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-06-12 21:39:45,231 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-06-12 21:39:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:45,231 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-06-12 21:39:45,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-06-12 21:39:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:45,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:45,233 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:45,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:45,433 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:45,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-06-12 21:39:45,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:45,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185827507] [2021-06-12 21:39:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:45,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:45,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185827507] [2021-06-12 21:39:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185827507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:45,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411591463] [2021-06-12 21:39:45,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:45,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:39:45,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:39:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:46,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:46,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:46,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:46,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:46,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:46,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:46,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:46,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-06-12 21:39:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:46,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411591463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:46,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:46,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-06-12 21:39:46,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683658566] [2021-06-12 21:39:46,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:39:46,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:39:46,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:46,105 INFO L87 Difference]: Start difference. First operand 888 states and 3703 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:46,458 INFO L93 Difference]: Finished difference Result 1936 states and 7355 transitions. [2021-06-12 21:39:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:39:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:46,462 INFO L225 Difference]: With dead ends: 1936 [2021-06-12 21:39:46,462 INFO L226 Difference]: Without dead ends: 1912 [2021-06-12 21:39:46,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:39:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-12 21:39:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-06-12 21:39:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.211678832116788) internal successors, (4039), 959 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-06-12 21:39:46,478 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-06-12 21:39:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:46,478 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-06-12 21:39:46,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-06-12 21:39:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:46,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:46,480 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:46,680 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-06-12 21:39:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929692947] [2021-06-12 21:39:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:46,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929692947] [2021-06-12 21:39:46,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929692947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545733676] [2021-06-12 21:39:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:39:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:47,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545733676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:47,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:47,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:39:47,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619769992] [2021-06-12 21:39:47,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:39:47,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:39:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:39:47,304 INFO L87 Difference]: Start difference. First operand 960 states and 4039 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:47,706 INFO L93 Difference]: Finished difference Result 989 states and 4112 transitions. [2021-06-12 21:39:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:39:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:47,708 INFO L225 Difference]: With dead ends: 989 [2021-06-12 21:39:47,708 INFO L226 Difference]: Without dead ends: 982 [2021-06-12 21:39:47,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:39:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-12 21:39:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-06-12 21:39:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 4.19730010384216) internal successors, (4042), 963 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-06-12 21:39:47,720 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-06-12 21:39:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:47,720 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-06-12 21:39:47,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-06-12 21:39:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:47,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:47,721 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:47,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-12 21:39:47,922 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:47,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-06-12 21:39:47,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:47,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829420320] [2021-06-12 21:39:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:48,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:48,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829420320] [2021-06-12 21:39:48,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829420320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:48,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670719842] [2021-06-12 21:39:48,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:39:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:48,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:48,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:48,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:48,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:48,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:48,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:48,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:48,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:39:48,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:48,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:48,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2021-06-12 21:39:48,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-06-12 21:39:50,688 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 57 [2021-06-12 21:39:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670719842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:50,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:50,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:39:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144639886] [2021-06-12 21:39:50,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:39:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:39:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:39:50,741 INFO L87 Difference]: Start difference. First operand 964 states and 4042 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:55,226 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-12 21:39:59,388 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 21:39:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:59,420 INFO L93 Difference]: Finished difference Result 1303 states and 5057 transitions. [2021-06-12 21:39:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:39:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:59,422 INFO L225 Difference]: With dead ends: 1303 [2021-06-12 21:39:59,422 INFO L226 Difference]: Without dead ends: 1284 [2021-06-12 21:39:59,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 8817.5ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:39:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-12 21:39:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1004. [2021-06-12 21:39:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.161515453639082) internal successors, (4174), 1003 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-06-12 21:39:59,436 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-06-12 21:39:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:59,436 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-06-12 21:39:59,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-06-12 21:39:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:59,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:59,437 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:59,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 21:39:59,638 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-06-12 21:39:59,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:59,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571782813] [2021-06-12 21:39:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:59,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:59,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571782813] [2021-06-12 21:39:59,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571782813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:59,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370115143] [2021-06-12 21:39:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:59,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:39:59,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:59,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:39:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:00,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370115143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:00,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:00,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:00,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478334538] [2021-06-12 21:40:00,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:00,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:00,351 INFO L87 Difference]: Start difference. First operand 1004 states and 4174 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:00,817 INFO L93 Difference]: Finished difference Result 1036 states and 4233 transitions. [2021-06-12 21:40:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:40:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:00,819 INFO L225 Difference]: With dead ends: 1036 [2021-06-12 21:40:00,819 INFO L226 Difference]: Without dead ends: 1018 [2021-06-12 21:40:00,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:40:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-12 21:40:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-06-12 21:40:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.161616161616162) internal successors, (4120), 990 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-06-12 21:40:00,830 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-06-12 21:40:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:00,831 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-06-12 21:40:00,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-06-12 21:40:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:00,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:00,832 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:01,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-12 21:40:01,033 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-06-12 21:40:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:01,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780450592] [2021-06-12 21:40:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:01,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:01,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780450592] [2021-06-12 21:40:01,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780450592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:01,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693366393] [2021-06-12 21:40:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:01,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:40:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:01,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693366393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:01,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:01,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570790754] [2021-06-12 21:40:01,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:01,900 INFO L87 Difference]: Start difference. First operand 991 states and 4120 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:02,286 INFO L93 Difference]: Finished difference Result 1016 states and 4172 transitions. [2021-06-12 21:40:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:02,288 INFO L225 Difference]: With dead ends: 1016 [2021-06-12 21:40:02,288 INFO L226 Difference]: Without dead ends: 1002 [2021-06-12 21:40:02,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 907.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-06-12 21:40:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-06-12 21:40:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 4.156028368794326) internal successors, (4102), 987 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-06-12 21:40:02,300 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-06-12 21:40:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:02,300 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-06-12 21:40:02,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-06-12 21:40:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:02,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:02,302 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:02,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:02,502 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-06-12 21:40:02,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:02,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307053248] [2021-06-12 21:40:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:02,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:02,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307053248] [2021-06-12 21:40:02,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307053248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:02,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972961403] [2021-06-12 21:40:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:02,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:40:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972961403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:03,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:03,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:03,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926653289] [2021-06-12 21:40:03,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:03,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:03,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:03,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:03,281 INFO L87 Difference]: Start difference. First operand 988 states and 4102 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:03,585 INFO L93 Difference]: Finished difference Result 959 states and 3842 transitions. [2021-06-12 21:40:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:40:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:03,587 INFO L225 Difference]: With dead ends: 959 [2021-06-12 21:40:03,587 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 21:40:03,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:40:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 21:40:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-06-12 21:40:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.077257889009793) internal successors, (3747), 919 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-06-12 21:40:03,599 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-06-12 21:40:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:03,599 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-06-12 21:40:03,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-06-12 21:40:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:03,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:03,601 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:03,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-12 21:40:03,801 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-06-12 21:40:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:03,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859151966] [2021-06-12 21:40:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:03,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859151966] [2021-06-12 21:40:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859151966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467414821] [2021-06-12 21:40:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:04,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:40:04,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467414821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:04,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:04,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127571522] [2021-06-12 21:40:04,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:04,598 INFO L87 Difference]: Start difference. First operand 920 states and 3747 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:04,936 INFO L93 Difference]: Finished difference Result 963 states and 3864 transitions. [2021-06-12 21:40:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:40:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:04,938 INFO L225 Difference]: With dead ends: 963 [2021-06-12 21:40:04,938 INFO L226 Difference]: Without dead ends: 956 [2021-06-12 21:40:04,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 785.9ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-12 21:40:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-06-12 21:40:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 4.049092849519744) internal successors, (3794), 937 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-06-12 21:40:04,949 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-06-12 21:40:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:04,949 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-06-12 21:40:04,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-06-12 21:40:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:04,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:04,950 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:05,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:05,151 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-06-12 21:40:05,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:05,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433430825] [2021-06-12 21:40:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:05,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433430825] [2021-06-12 21:40:05,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433430825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778337321] [2021-06-12 21:40:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:05,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:40:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:05,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:05,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:05,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:05,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:05,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:05,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:05,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:05,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:05,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:05,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:05,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-06-12 21:40:05,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-06-12 21:40:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:05,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778337321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:05,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:05,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-12 21:40:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533937645] [2021-06-12 21:40:05,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:40:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:40:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:40:05,880 INFO L87 Difference]: Start difference. First operand 938 states and 3794 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:10,183 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 21:40:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:10,685 INFO L93 Difference]: Finished difference Result 3046 states and 12070 transitions. [2021-06-12 21:40:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:40:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:10,691 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 21:40:10,691 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 21:40:10,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4763.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 21:40:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-06-12 21:40:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 4.475931677018633) internal successors, (5765), 1288 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-06-12 21:40:10,721 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-06-12 21:40:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:10,721 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-06-12 21:40:10,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-06-12 21:40:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:10,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:10,723 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:10,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-12 21:40:10,923 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-06-12 21:40:10,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:10,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451329061] [2021-06-12 21:40:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:11,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451329061] [2021-06-12 21:40:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451329061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142857960] [2021-06-12 21:40:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:11,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:11,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142857960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:11,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829541648] [2021-06-12 21:40:11,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:11,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:11,720 INFO L87 Difference]: Start difference. First operand 1289 states and 5765 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:12,160 INFO L93 Difference]: Finished difference Result 1336 states and 5880 transitions. [2021-06-12 21:40:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:40:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:12,163 INFO L225 Difference]: With dead ends: 1336 [2021-06-12 21:40:12,163 INFO L226 Difference]: Without dead ends: 1318 [2021-06-12 21:40:12,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-12 21:40:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-06-12 21:40:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.472501936483346) internal successors, (5774), 1291 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-06-12 21:40:12,182 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-06-12 21:40:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:12,182 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-06-12 21:40:12,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-06-12 21:40:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:12,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:12,184 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:12,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:12,389 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-06-12 21:40:12,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:12,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692625332] [2021-06-12 21:40:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692625332] [2021-06-12 21:40:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692625332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518052045] [2021-06-12 21:40:12,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:12,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:40:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:40:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:12,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:12,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:12,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:12,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:12,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:12,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:12,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:12,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:12,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:40:12,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-12 21:40:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518052045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-12 21:40:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262601995] [2021-06-12 21:40:13,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:40:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:40:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:40:13,068 INFO L87 Difference]: Start difference. First operand 1292 states and 5774 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:13,603 INFO L93 Difference]: Finished difference Result 3442 states and 14583 transitions. [2021-06-12 21:40:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:40:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:13,611 INFO L225 Difference]: With dead ends: 3442 [2021-06-12 21:40:13,626 INFO L226 Difference]: Without dead ends: 3422 [2021-06-12 21:40:13,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-12 21:40:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-06-12 21:40:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 4.708386277001271) internal successors, (7411), 1574 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-06-12 21:40:13,659 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-06-12 21:40:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:13,659 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-06-12 21:40:13,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-06-12 21:40:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:13,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:13,662 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:13,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:13,863 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-06-12 21:40:13,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:13,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706322943] [2021-06-12 21:40:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:14,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706322943] [2021-06-12 21:40:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706322943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737404555] [2021-06-12 21:40:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:14,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:14,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:14,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:14,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737404555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:14,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:14,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:14,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000140523] [2021-06-12 21:40:14,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:14,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:14,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:14,540 INFO L87 Difference]: Start difference. First operand 1575 states and 7411 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:14,976 INFO L93 Difference]: Finished difference Result 1607 states and 7481 transitions. [2021-06-12 21:40:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:14,981 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 21:40:14,981 INFO L226 Difference]: Without dead ends: 1593 [2021-06-12 21:40:14,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-12 21:40:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-06-12 21:40:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.707829408020369) internal successors, (7396), 1571 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-06-12 21:40:15,012 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-06-12 21:40:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:15,012 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-06-12 21:40:15,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-06-12 21:40:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:15,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:15,016 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:15,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-12 21:40:15,229 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-06-12 21:40:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:15,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573501594] [2021-06-12 21:40:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:15,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:15,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573501594] [2021-06-12 21:40:15,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573501594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:15,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107142423] [2021-06-12 21:40:15,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:15,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:40:15,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107142423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:16,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:16,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46610532] [2021-06-12 21:40:16,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:16,057 INFO L87 Difference]: Start difference. First operand 1572 states and 7396 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:16,364 INFO L93 Difference]: Finished difference Result 1596 states and 7442 transitions. [2021-06-12 21:40:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:40:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:16,368 INFO L225 Difference]: With dead ends: 1596 [2021-06-12 21:40:16,368 INFO L226 Difference]: Without dead ends: 1577 [2021-06-12 21:40:16,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-06-12 21:40:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-06-12 21:40:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.732558139534884) internal successors, (7326), 1548 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-06-12 21:40:16,391 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-06-12 21:40:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:16,391 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-06-12 21:40:16,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-06-12 21:40:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:16,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:16,393 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:16,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:16,594 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-06-12 21:40:16,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:16,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179899395] [2021-06-12 21:40:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:16,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179899395] [2021-06-12 21:40:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179899395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540451521] [2021-06-12 21:40:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:16,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:40:16,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:17,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:17,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:17,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:17,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:17,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:17,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:17,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:40:17,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:133, output treesize:105 [2021-06-12 21:40:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:40:17,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540451521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:17,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:17,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-12 21:40:17,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857668062] [2021-06-12 21:40:17,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:40:17,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:40:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:40:17,578 INFO L87 Difference]: Start difference. First operand 1549 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:18,244 INFO L93 Difference]: Finished difference Result 1650 states and 7580 transitions. [2021-06-12 21:40:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:18,248 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 21:40:18,248 INFO L226 Difference]: Without dead ends: 1642 [2021-06-12 21:40:18,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:40:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-06-12 21:40:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1549. [2021-06-12 21:40:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.715762273901809) internal successors, (7300), 1548 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7300 transitions. [2021-06-12 21:40:18,269 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7300 transitions. Word has length 27 [2021-06-12 21:40:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:18,269 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7300 transitions. [2021-06-12 21:40:18,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7300 transitions. [2021-06-12 21:40:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:18,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:18,272 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:18,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:18,472 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1358794172, now seen corresponding path program 127 times [2021-06-12 21:40:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355124020] [2021-06-12 21:40:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:18,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:18,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355124020] [2021-06-12 21:40:18,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355124020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:18,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785661198] [2021-06-12 21:40:18,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785661198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346129962] [2021-06-12 21:40:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:19,283 INFO L87 Difference]: Start difference. First operand 1549 states and 7300 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:19,489 INFO L93 Difference]: Finished difference Result 1575 states and 7357 transitions. [2021-06-12 21:40:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:40:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:19,492 INFO L225 Difference]: With dead ends: 1575 [2021-06-12 21:40:19,492 INFO L226 Difference]: Without dead ends: 1559 [2021-06-12 21:40:19,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-12 21:40:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1542. [2021-06-12 21:40:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.720960415314731) internal successors, (7275), 1541 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 7275 transitions. [2021-06-12 21:40:19,528 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 7275 transitions. Word has length 27 [2021-06-12 21:40:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:19,528 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 7275 transitions. [2021-06-12 21:40:19,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 7275 transitions. [2021-06-12 21:40:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:19,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:19,531 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:19,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-12 21:40:19,731 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1617589496, now seen corresponding path program 128 times [2021-06-12 21:40:19,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:19,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971186664] [2021-06-12 21:40:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:19,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:19,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971186664] [2021-06-12 21:40:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971186664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:19,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799241359] [2021-06-12 21:40:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:20,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:40:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:20,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799241359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:20,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:20,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:20,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390809171] [2021-06-12 21:40:20,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:20,684 INFO L87 Difference]: Start difference. First operand 1542 states and 7275 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:21,035 INFO L93 Difference]: Finished difference Result 1472 states and 6714 transitions. [2021-06-12 21:40:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:40:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:21,037 INFO L225 Difference]: With dead ends: 1472 [2021-06-12 21:40:21,037 INFO L226 Difference]: Without dead ends: 1458 [2021-06-12 21:40:21,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-06-12 21:40:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1437. [2021-06-12 21:40:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 4.616295264623956) internal successors, (6629), 1436 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 6629 transitions. [2021-06-12 21:40:21,055 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 6629 transitions. Word has length 27 [2021-06-12 21:40:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:21,055 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 6629 transitions. [2021-06-12 21:40:21,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 6629 transitions. [2021-06-12 21:40:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:21,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:21,057 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:21,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:21,258 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1348843068, now seen corresponding path program 129 times [2021-06-12 21:40:21,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:21,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328086893] [2021-06-12 21:40:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:21,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328086893] [2021-06-12 21:40:21,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328086893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790247929] [2021-06-12 21:40:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:21,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:40:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:21,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:22,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790247929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:22,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:22,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:22,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27837769] [2021-06-12 21:40:22,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:22,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:22,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:22,200 INFO L87 Difference]: Start difference. First operand 1437 states and 6629 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:22,632 INFO L93 Difference]: Finished difference Result 1273 states and 5538 transitions. [2021-06-12 21:40:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:40:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:22,635 INFO L225 Difference]: With dead ends: 1273 [2021-06-12 21:40:22,635 INFO L226 Difference]: Without dead ends: 1251 [2021-06-12 21:40:22,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-12 21:40:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1232. [2021-06-12 21:40:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.418359057676685) internal successors, (5439), 1231 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5439 transitions. [2021-06-12 21:40:22,651 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5439 transitions. Word has length 27 [2021-06-12 21:40:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:22,651 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5439 transitions. [2021-06-12 21:40:22,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5439 transitions. [2021-06-12 21:40:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:22,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:22,653 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:22,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 21:40:22,854 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -133551674, now seen corresponding path program 130 times [2021-06-12 21:40:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:22,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527784034] [2021-06-12 21:40:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:23,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527784034] [2021-06-12 21:40:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527784034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971379895] [2021-06-12 21:40:23,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:23,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:40:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:23,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:23,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:23,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:23,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:23,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:23,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:23,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:23,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:23,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:40:23,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-12 21:40:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:23,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971379895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:23,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:23,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-12 21:40:23,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003241861] [2021-06-12 21:40:23,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:40:23,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:40:23,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:40:23,492 INFO L87 Difference]: Start difference. First operand 1232 states and 5439 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:24,000 INFO L93 Difference]: Finished difference Result 2587 states and 10394 transitions. [2021-06-12 21:40:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:40:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:24,005 INFO L225 Difference]: With dead ends: 2587 [2021-06-12 21:40:24,005 INFO L226 Difference]: Without dead ends: 2542 [2021-06-12 21:40:24,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 591.3ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-12 21:40:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1419. [2021-06-12 21:40:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 4.562059238363893) internal successors, (6469), 1418 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 6469 transitions. [2021-06-12 21:40:24,032 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 6469 transitions. Word has length 27 [2021-06-12 21:40:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:24,032 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 6469 transitions. [2021-06-12 21:40:24,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 6469 transitions. [2021-06-12 21:40:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:24,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:24,034 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:24,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:24,235 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1158265598, now seen corresponding path program 131 times [2021-06-12 21:40:24,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:24,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854549906] [2021-06-12 21:40:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:24,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854549906] [2021-06-12 21:40:24,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854549906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845546197] [2021-06-12 21:40:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:24,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:40:24,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:25,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845546197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:25,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:25,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006243710] [2021-06-12 21:40:25,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:25,129 INFO L87 Difference]: Start difference. First operand 1419 states and 6469 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:25,346 INFO L93 Difference]: Finished difference Result 1448 states and 6542 transitions. [2021-06-12 21:40:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:25,349 INFO L225 Difference]: With dead ends: 1448 [2021-06-12 21:40:25,349 INFO L226 Difference]: Without dead ends: 1440 [2021-06-12 21:40:25,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-06-12 21:40:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1417. [2021-06-12 21:40:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 4.562146892655368) internal successors, (6460), 1416 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 6460 transitions. [2021-06-12 21:40:25,369 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 6460 transitions. Word has length 27 [2021-06-12 21:40:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:25,369 INFO L482 AbstractCegarLoop]: Abstraction has 1417 states and 6460 transitions. [2021-06-12 21:40:25,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 6460 transitions. [2021-06-12 21:40:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:25,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:25,371 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:25,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-12 21:40:25,571 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -664653662, now seen corresponding path program 132 times [2021-06-12 21:40:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:25,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256492869] [2021-06-12 21:40:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:40:25,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256492869] [2021-06-12 21:40:25,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256492869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:25,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073948512] [2021-06-12 21:40:25,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:25,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:40:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:26,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:26,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:26,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:26,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:26,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:40:26,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-12 21:40:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073948512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:26,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:26,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-12 21:40:26,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199245231] [2021-06-12 21:40:26,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:40:26,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:26,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:40:26,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:40:26,404 INFO L87 Difference]: Start difference. First operand 1417 states and 6460 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:26,736 INFO L93 Difference]: Finished difference Result 1648 states and 7113 transitions. [2021-06-12 21:40:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:40:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:26,739 INFO L225 Difference]: With dead ends: 1648 [2021-06-12 21:40:26,739 INFO L226 Difference]: Without dead ends: 1628 [2021-06-12 21:40:26,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-12 21:40:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1436. [2021-06-12 21:40:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 4.559581881533101) internal successors, (6543), 1435 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 6543 transitions. [2021-06-12 21:40:26,759 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 6543 transitions. Word has length 27 [2021-06-12 21:40:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 6543 transitions. [2021-06-12 21:40:26,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 6543 transitions. [2021-06-12 21:40:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:26,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:26,761 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:26,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:26,962 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash -267499616, now seen corresponding path program 133 times [2021-06-12 21:40:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:26,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404285934] [2021-06-12 21:40:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:27,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:27,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404285934] [2021-06-12 21:40:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404285934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:27,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096959079] [2021-06-12 21:40:27,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:27,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096959079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:27,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:27,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337203788] [2021-06-12 21:40:27,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:27,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:27,897 INFO L87 Difference]: Start difference. First operand 1436 states and 6543 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:28,508 INFO L93 Difference]: Finished difference Result 1480 states and 6651 transitions. [2021-06-12 21:40:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:40:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:28,511 INFO L225 Difference]: With dead ends: 1480 [2021-06-12 21:40:28,511 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 21:40:28,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1039.3ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:40:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 21:40:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1441. [2021-06-12 21:40:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.552777777777778) internal successors, (6556), 1440 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6556 transitions. [2021-06-12 21:40:28,541 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6556 transitions. Word has length 27 [2021-06-12 21:40:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:28,541 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6556 transitions. [2021-06-12 21:40:28,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6556 transitions. [2021-06-12 21:40:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:28,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:28,543 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:28,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:28,744 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1700897470, now seen corresponding path program 134 times [2021-06-12 21:40:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097770051] [2021-06-12 21:40:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:28,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097770051] [2021-06-12 21:40:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097770051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242081903] [2021-06-12 21:40:28,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242081903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:29,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:29,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702380723] [2021-06-12 21:40:29,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:29,676 INFO L87 Difference]: Start difference. First operand 1441 states and 6556 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:30,193 INFO L93 Difference]: Finished difference Result 1485 states and 6664 transitions. [2021-06-12 21:40:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:40:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:30,195 INFO L225 Difference]: With dead ends: 1485 [2021-06-12 21:40:30,195 INFO L226 Difference]: Without dead ends: 1469 [2021-06-12 21:40:30,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 976.6ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-12 21:40:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1441. [2021-06-12 21:40:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.551388888888889) internal successors, (6554), 1440 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6554 transitions. [2021-06-12 21:40:30,213 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6554 transitions. Word has length 27 [2021-06-12 21:40:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:30,213 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6554 transitions. [2021-06-12 21:40:30,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6554 transitions. [2021-06-12 21:40:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:30,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:30,215 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:30,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 21:40:30,415 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash -724293666, now seen corresponding path program 135 times [2021-06-12 21:40:30,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:30,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056293580] [2021-06-12 21:40:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:30,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056293580] [2021-06-12 21:40:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056293580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885152403] [2021-06-12 21:40:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:30,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:40:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:40:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:30,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:30,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:30,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:30,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:30,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:30,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:30,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:30,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:40:30,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:71 [2021-06-12 21:40:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:40:31,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885152403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:31,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:31,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-12 21:40:31,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568179333] [2021-06-12 21:40:31,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:40:31,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:40:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:40:31,019 INFO L87 Difference]: Start difference. First operand 1441 states and 6554 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:31,722 INFO L93 Difference]: Finished difference Result 2434 states and 10147 transitions. [2021-06-12 21:40:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:40:31,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:31,727 INFO L225 Difference]: With dead ends: 2434 [2021-06-12 21:40:31,727 INFO L226 Difference]: Without dead ends: 2415 [2021-06-12 21:40:31,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-12 21:40:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1570. [2021-06-12 21:40:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 4.625239005736137) internal successors, (7257), 1569 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 7257 transitions. [2021-06-12 21:40:31,752 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 7257 transitions. Word has length 27 [2021-06-12 21:40:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:31,752 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 7257 transitions. [2021-06-12 21:40:31,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 7257 transitions. [2021-06-12 21:40:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:31,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:31,755 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:31,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 21:40:31,955 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1399100484, now seen corresponding path program 136 times [2021-06-12 21:40:31,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:31,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103333378] [2021-06-12 21:40:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:32,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103333378] [2021-06-12 21:40:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103333378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448949884] [2021-06-12 21:40:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:32,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:32,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:32,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448949884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:32,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:32,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:32,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726932804] [2021-06-12 21:40:32,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:32,719 INFO L87 Difference]: Start difference. First operand 1570 states and 7257 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:33,150 INFO L93 Difference]: Finished difference Result 1530 states and 6921 transitions. [2021-06-12 21:40:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:40:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:33,153 INFO L225 Difference]: With dead ends: 1530 [2021-06-12 21:40:33,153 INFO L226 Difference]: Without dead ends: 1516 [2021-06-12 21:40:33,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 779.2ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-12 21:40:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1499. [2021-06-12 21:40:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 4.568758344459279) internal successors, (6844), 1498 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 6844 transitions. [2021-06-12 21:40:33,173 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 6844 transitions. Word has length 27 [2021-06-12 21:40:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 6844 transitions. [2021-06-12 21:40:33,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 6844 transitions. [2021-06-12 21:40:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:33,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:33,176 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:33,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-12 21:40:33,376 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1667846912, now seen corresponding path program 137 times [2021-06-12 21:40:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:33,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791138511] [2021-06-12 21:40:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:33,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791138511] [2021-06-12 21:40:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791138511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766358092] [2021-06-12 21:40:33,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:33,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:40:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:40:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:34,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766358092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:34,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:34,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370141286] [2021-06-12 21:40:34,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:34,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:34,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:34,205 INFO L87 Difference]: Start difference. First operand 1499 states and 6844 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:34,465 INFO L93 Difference]: Finished difference Result 1529 states and 6905 transitions. [2021-06-12 21:40:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:40:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:34,468 INFO L225 Difference]: With dead ends: 1529 [2021-06-12 21:40:34,468 INFO L226 Difference]: Without dead ends: 1511 [2021-06-12 21:40:34,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-06-12 21:40:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1483. [2021-06-12 21:40:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.582321187584346) internal successors, (6791), 1482 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6791 transitions. [2021-06-12 21:40:34,505 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6791 transitions. Word has length 27 [2021-06-12 21:40:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:34,506 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 6791 transitions. [2021-06-12 21:40:34,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6791 transitions. [2021-06-12 21:40:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:34,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:34,509 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:34,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:34,725 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1070450466, now seen corresponding path program 138 times [2021-06-12 21:40:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:34,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35329289] [2021-06-12 21:40:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:40:34,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:34,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35329289] [2021-06-12 21:40:34,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35329289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665433137] [2021-06-12 21:40:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:34,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:40:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:35,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:35,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:40:35,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:35,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:35,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:40:35,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-12 21:40:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:35,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665433137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:35,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:35,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-12 21:40:35,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764828645] [2021-06-12 21:40:35,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:40:35,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:40:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:40:35,556 INFO L87 Difference]: Start difference. First operand 1483 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:35,931 INFO L93 Difference]: Finished difference Result 2432 states and 10217 transitions. [2021-06-12 21:40:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:40:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:35,935 INFO L225 Difference]: With dead ends: 2432 [2021-06-12 21:40:35,935 INFO L226 Difference]: Without dead ends: 2404 [2021-06-12 21:40:35,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:40:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-12 21:40:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1620. [2021-06-12 21:40:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.625077208153181) internal successors, (7488), 1619 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7488 transitions. [2021-06-12 21:40:35,975 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7488 transitions. Word has length 27 [2021-06-12 21:40:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:35,975 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 7488 transitions. [2021-06-12 21:40:35,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7488 transitions. [2021-06-12 21:40:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:35,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:35,978 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:36,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-12 21:40:36,202 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:36,202 INFO L82 PathProgramCache]: Analyzing trace with hash 175326052, now seen corresponding path program 139 times [2021-06-12 21:40:36,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:36,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905602355] [2021-06-12 21:40:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:36,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:36,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905602355] [2021-06-12 21:40:36,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905602355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:36,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107084839] [2021-06-12 21:40:36,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:40:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107084839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:37,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:37,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:37,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952565181] [2021-06-12 21:40:37,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:37,180 INFO L87 Difference]: Start difference. First operand 1620 states and 7488 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:37,750 INFO L93 Difference]: Finished difference Result 1647 states and 7547 transitions. [2021-06-12 21:40:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:40:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:37,754 INFO L225 Difference]: With dead ends: 1647 [2021-06-12 21:40:37,754 INFO L226 Difference]: Without dead ends: 1633 [2021-06-12 21:40:37,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1110.9ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-12 21:40:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1612. [2021-06-12 21:40:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 4.631905648665425) internal successors, (7462), 1611 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7462 transitions. [2021-06-12 21:40:37,775 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7462 transitions. Word has length 27 [2021-06-12 21:40:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:37,775 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 7462 transitions. [2021-06-12 21:40:37,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7462 transitions. [2021-06-12 21:40:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:40:37,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:37,777 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:37,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:37,978 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash -673296420, now seen corresponding path program 140 times [2021-06-12 21:40:37,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:37,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736680459] [2021-06-12 21:40:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:38,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:38,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736680459] [2021-06-12 21:40:38,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736680459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:38,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479910293] [2021-06-12 21:40:38,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:38,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:38,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479910293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:38,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:38,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:40:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827015288] [2021-06-12 21:40:38,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:38,833 INFO L87 Difference]: Start difference. First operand 1612 states and 7462 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:39,348 INFO L93 Difference]: Finished difference Result 1632 states and 7497 transitions. [2021-06-12 21:40:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:40:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:40:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:39,352 INFO L225 Difference]: With dead ends: 1632 [2021-06-12 21:40:39,352 INFO L226 Difference]: Without dead ends: 1614 [2021-06-12 21:40:39,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 917.4ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:40:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-12 21:40:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1586. [2021-06-12 21:40:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 4.6574132492113565) internal successors, (7382), 1585 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 7382 transitions. [2021-06-12 21:40:39,375 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 7382 transitions. Word has length 27 [2021-06-12 21:40:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:39,375 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 7382 transitions. [2021-06-12 21:40:39,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 7382 transitions. [2021-06-12 21:40:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:39,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:39,378 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:39,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:39,578 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1068054097, now seen corresponding path program 141 times [2021-06-12 21:40:39,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:39,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946854496] [2021-06-12 21:40:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:39,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:39,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946854496] [2021-06-12 21:40:39,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946854496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:39,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762185154] [2021-06-12 21:40:39,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:39,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:40:39,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:40:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:40,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762185154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:40,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:40,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:40,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742245629] [2021-06-12 21:40:40,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:40,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:40,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:40,723 INFO L87 Difference]: Start difference. First operand 1586 states and 7382 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:41,299 INFO L93 Difference]: Finished difference Result 1626 states and 7470 transitions. [2021-06-12 21:40:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:41,303 INFO L225 Difference]: With dead ends: 1626 [2021-06-12 21:40:41,303 INFO L226 Difference]: Without dead ends: 1622 [2021-06-12 21:40:41,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1352.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:40:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-12 21:40:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1600. [2021-06-12 21:40:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 4.632895559724828) internal successors, (7408), 1599 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 7408 transitions. [2021-06-12 21:40:41,325 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 7408 transitions. Word has length 28 [2021-06-12 21:40:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:41,325 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 7408 transitions. [2021-06-12 21:40:41,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 7408 transitions. [2021-06-12 21:40:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:41,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:41,327 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:41,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:41,528 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1313380425, now seen corresponding path program 142 times [2021-06-12 21:40:41,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:41,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787156936] [2021-06-12 21:40:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:41,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:41,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787156936] [2021-06-12 21:40:41,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787156936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:41,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587227211] [2021-06-12 21:40:41,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:41,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:41,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:41,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:41,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:42,422 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:40:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587227211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285019082] [2021-06-12 21:40:42,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:42,727 INFO L87 Difference]: Start difference. First operand 1600 states and 7408 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:43,390 INFO L93 Difference]: Finished difference Result 1634 states and 7482 transitions. [2021-06-12 21:40:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:40:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:43,393 INFO L225 Difference]: With dead ends: 1634 [2021-06-12 21:40:43,393 INFO L226 Difference]: Without dead ends: 1630 [2021-06-12 21:40:43,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1382.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:40:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-12 21:40:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1604. [2021-06-12 21:40:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 4.625077978789769) internal successors, (7414), 1603 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 7414 transitions. [2021-06-12 21:40:43,414 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 7414 transitions. Word has length 28 [2021-06-12 21:40:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:43,414 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 7414 transitions. [2021-06-12 21:40:43,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 7414 transitions. [2021-06-12 21:40:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:43,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:43,416 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:43,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:43,617 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 775887569, now seen corresponding path program 143 times [2021-06-12 21:40:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106044518] [2021-06-12 21:40:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:43,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:43,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106044518] [2021-06-12 21:40:43,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106044518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:43,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896177057] [2021-06-12 21:40:43,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:43,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:40:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:44,394 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:40:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896177057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381668830] [2021-06-12 21:40:44,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:44,873 INFO L87 Difference]: Start difference. First operand 1604 states and 7414 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:45,276 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-12 21:40:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:40:45,277 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:45,279 INFO L225 Difference]: With dead ends: 1651 [2021-06-12 21:40:45,280 INFO L226 Difference]: Without dead ends: 1647 [2021-06-12 21:40:45,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1212.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:40:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-12 21:40:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1616. [2021-06-12 21:40:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 4.610526315789474) internal successors, (7446), 1615 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 7446 transitions. [2021-06-12 21:40:45,300 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 7446 transitions. Word has length 28 [2021-06-12 21:40:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:45,300 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 7446 transitions. [2021-06-12 21:40:45,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 7446 transitions. [2021-06-12 21:40:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:45,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:45,302 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:45,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-12 21:40:45,503 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash -72733363, now seen corresponding path program 144 times [2021-06-12 21:40:45,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:45,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308882040] [2021-06-12 21:40:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:45,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:45,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308882040] [2021-06-12 21:40:45,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308882040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:45,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706562178] [2021-06-12 21:40:45,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:45,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:40:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:46,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706562178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:46,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:46,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:46,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731690624] [2021-06-12 21:40:46,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:46,548 INFO L87 Difference]: Start difference. First operand 1616 states and 7446 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:47,418 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-12 21:40:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:40:47,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:47,421 INFO L225 Difference]: With dead ends: 1651 [2021-06-12 21:40:47,421 INFO L226 Difference]: Without dead ends: 1647 [2021-06-12 21:40:47,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:40:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-12 21:40:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1617. [2021-06-12 21:40:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.608292079207921) internal successors, (7447), 1616 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7447 transitions. [2021-06-12 21:40:47,442 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7447 transitions. Word has length 28 [2021-06-12 21:40:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7447 transitions. [2021-06-12 21:40:47,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7447 transitions. [2021-06-12 21:40:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:47,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:47,445 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-12 21:40:47,645 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655091, now seen corresponding path program 145 times [2021-06-12 21:40:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945197812] [2021-06-12 21:40:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:47,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:47,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945197812] [2021-06-12 21:40:47,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945197812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:47,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313971561] [2021-06-12 21:40:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:48,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313971561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:48,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:48,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:48,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358658541] [2021-06-12 21:40:48,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:48,690 INFO L87 Difference]: Start difference. First operand 1617 states and 7447 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:49,196 INFO L93 Difference]: Finished difference Result 1661 states and 7546 transitions. [2021-06-12 21:40:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:40:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:49,199 INFO L225 Difference]: With dead ends: 1661 [2021-06-12 21:40:49,199 INFO L226 Difference]: Without dead ends: 1657 [2021-06-12 21:40:49,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:40:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-12 21:40:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1613. [2021-06-12 21:40:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.61166253101737) internal successors, (7434), 1612 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 7434 transitions. [2021-06-12 21:40:49,219 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 7434 transitions. Word has length 28 [2021-06-12 21:40:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:49,219 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 7434 transitions. [2021-06-12 21:40:49,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 7434 transitions. [2021-06-12 21:40:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:49,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:49,222 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:49,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-12 21:40:49,422 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1997787763, now seen corresponding path program 146 times [2021-06-12 21:40:49,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:49,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780660966] [2021-06-12 21:40:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:49,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:49,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780660966] [2021-06-12 21:40:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780660966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:49,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072229061] [2021-06-12 21:40:49,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:49,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:50,200 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 21:40:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072229061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:40:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687816760] [2021-06-12 21:40:50,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:50,584 INFO L87 Difference]: Start difference. First operand 1613 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:51,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:51,027 INFO L93 Difference]: Finished difference Result 1648 states and 7509 transitions. [2021-06-12 21:40:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:51,030 INFO L225 Difference]: With dead ends: 1648 [2021-06-12 21:40:51,030 INFO L226 Difference]: Without dead ends: 1644 [2021-06-12 21:40:51,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1237.9ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:40:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-06-12 21:40:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1618. [2021-06-12 21:40:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.6017316017316015) internal successors, (7441), 1617 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7441 transitions. [2021-06-12 21:40:51,052 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7441 transitions. Word has length 28 [2021-06-12 21:40:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:51,052 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7441 transitions. [2021-06-12 21:40:51,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7441 transitions. [2021-06-12 21:40:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:51,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:51,054 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:51,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:51,255 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2038384209, now seen corresponding path program 147 times [2021-06-12 21:40:51,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:51,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446259396] [2021-06-12 21:40:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:51,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:51,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446259396] [2021-06-12 21:40:51,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446259396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:51,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814601458] [2021-06-12 21:40:51,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:51,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:40:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:40:51,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:51,897 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:40:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814601458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:52,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:52,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:40:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010942144] [2021-06-12 21:40:52,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:52,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:52,251 INFO L87 Difference]: Start difference. First operand 1618 states and 7441 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:52,728 INFO L93 Difference]: Finished difference Result 1653 states and 7516 transitions. [2021-06-12 21:40:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:40:52,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:52,732 INFO L225 Difference]: With dead ends: 1653 [2021-06-12 21:40:52,732 INFO L226 Difference]: Without dead ends: 1649 [2021-06-12 21:40:52,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:40:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-12 21:40:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1617. [2021-06-12 21:40:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.600866336633663) internal successors, (7435), 1616 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7435 transitions. [2021-06-12 21:40:52,754 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7435 transitions. Word has length 28 [2021-06-12 21:40:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:52,754 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7435 transitions. [2021-06-12 21:40:52,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7435 transitions. [2021-06-12 21:40:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:52,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:52,757 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:52,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:52,957 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash 232467601, now seen corresponding path program 148 times [2021-06-12 21:40:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:52,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937040067] [2021-06-12 21:40:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:53,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:53,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937040067] [2021-06-12 21:40:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937040067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:53,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611364819] [2021-06-12 21:40:53,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:53,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:53,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:53,655 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:40:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:53,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611364819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:53,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:53,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:40:53,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991892241] [2021-06-12 21:40:53,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:53,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:53,977 INFO L87 Difference]: Start difference. First operand 1617 states and 7435 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:54,473 INFO L93 Difference]: Finished difference Result 1656 states and 7522 transitions. [2021-06-12 21:40:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:40:54,473 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:54,476 INFO L225 Difference]: With dead ends: 1656 [2021-06-12 21:40:54,476 INFO L226 Difference]: Without dead ends: 1652 [2021-06-12 21:40:54,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:40:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-12 21:40:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1622. [2021-06-12 21:40:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.592227020357804) internal successors, (7444), 1621 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7444 transitions. [2021-06-12 21:40:54,499 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7444 transitions. Word has length 28 [2021-06-12 21:40:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:54,499 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7444 transitions. [2021-06-12 21:40:54,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7444 transitions. [2021-06-12 21:40:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:54,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:54,501 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:54,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-12 21:40:54,703 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1971856055, now seen corresponding path program 149 times [2021-06-12 21:40:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:54,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640723185] [2021-06-12 21:40:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:54,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640723185] [2021-06-12 21:40:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640723185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748483718] [2021-06-12 21:40:54,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:54,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:40:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:55,389 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 21:40:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:55,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748483718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:55,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:55,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:40:55,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203668439] [2021-06-12 21:40:55,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:55,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:55,854 INFO L87 Difference]: Start difference. First operand 1622 states and 7444 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:56,145 INFO L93 Difference]: Finished difference Result 1668 states and 7554 transitions. [2021-06-12 21:40:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:40:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:56,149 INFO L225 Difference]: With dead ends: 1668 [2021-06-12 21:40:56,149 INFO L226 Difference]: Without dead ends: 1664 [2021-06-12 21:40:56,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1039.4ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:40:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-06-12 21:40:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1632. [2021-06-12 21:40:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 4.58185162477008) internal successors, (7473), 1631 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 7473 transitions. [2021-06-12 21:40:56,173 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 7473 transitions. Word has length 28 [2021-06-12 21:40:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:56,174 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 7473 transitions. [2021-06-12 21:40:56,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 7473 transitions. [2021-06-12 21:40:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:56,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:56,176 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:56,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:56,381 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1991978569, now seen corresponding path program 150 times [2021-06-12 21:40:56,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:56,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646489256] [2021-06-12 21:40:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:56,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646489256] [2021-06-12 21:40:56,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646489256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422474028] [2021-06-12 21:40:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:56,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:40:56,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:40:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:57,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422474028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:57,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:57,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:40:57,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013223414] [2021-06-12 21:40:57,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:57,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:57,332 INFO L87 Difference]: Start difference. First operand 1632 states and 7473 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:57,645 INFO L93 Difference]: Finished difference Result 1671 states and 7560 transitions. [2021-06-12 21:40:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:40:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:57,648 INFO L225 Difference]: With dead ends: 1671 [2021-06-12 21:40:57,648 INFO L226 Difference]: Without dead ends: 1667 [2021-06-12 21:40:57,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 954.8ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-06-12 21:40:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1636. [2021-06-12 21:40:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 4.575535168195719) internal successors, (7481), 1635 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 7481 transitions. [2021-06-12 21:40:57,668 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 7481 transitions. Word has length 28 [2021-06-12 21:40:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:57,668 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 7481 transitions. [2021-06-12 21:40:57,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 7481 transitions. [2021-06-12 21:40:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:57,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:57,670 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:57,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-12 21:40:57,871 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1733183245, now seen corresponding path program 151 times [2021-06-12 21:40:57,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:57,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545228596] [2021-06-12 21:40:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:58,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545228596] [2021-06-12 21:40:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545228596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178744455] [2021-06-12 21:40:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178744455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:40:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31583108] [2021-06-12 21:40:58,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:58,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:58,741 INFO L87 Difference]: Start difference. First operand 1636 states and 7481 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:59,107 INFO L93 Difference]: Finished difference Result 1674 states and 7564 transitions. [2021-06-12 21:40:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:40:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:40:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:59,110 INFO L225 Difference]: With dead ends: 1674 [2021-06-12 21:40:59,111 INFO L226 Difference]: Without dead ends: 1670 [2021-06-12 21:40:59,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:40:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-12 21:40:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1627. [2021-06-12 21:40:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 4.583640836408364) internal successors, (7453), 1626 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 7453 transitions. [2021-06-12 21:40:59,133 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 7453 transitions. Word has length 28 [2021-06-12 21:40:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:59,133 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 7453 transitions. [2021-06-12 21:40:59,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 7453 transitions. [2021-06-12 21:40:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:40:59,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:59,136 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:59,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:59,336 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1830495825, now seen corresponding path program 152 times [2021-06-12 21:40:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:59,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145411836] [2021-06-12 21:40:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:59,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145411836] [2021-06-12 21:40:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145411836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247038848] [2021-06-12 21:40:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:59,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:59,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:40:59,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:00,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247038848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:00,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:00,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:00,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7310071] [2021-06-12 21:41:00,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:00,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:00,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:00,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:00,499 INFO L87 Difference]: Start difference. First operand 1627 states and 7453 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:01,095 INFO L93 Difference]: Finished difference Result 1665 states and 7539 transitions. [2021-06-12 21:41:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:41:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:01,098 INFO L225 Difference]: With dead ends: 1665 [2021-06-12 21:41:01,099 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 21:41:01,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1405.7ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:41:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 21:41:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1631. [2021-06-12 21:41:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 4.5773006134969325) internal successors, (7461), 1630 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 7461 transitions. [2021-06-12 21:41:01,119 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 7461 transitions. Word has length 28 [2021-06-12 21:41:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 7461 transitions. [2021-06-12 21:41:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 7461 transitions. [2021-06-12 21:41:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:01,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:01,122 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:01,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:01,322 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191923, now seen corresponding path program 153 times [2021-06-12 21:41:01,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:01,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884771615] [2021-06-12 21:41:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:01,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884771615] [2021-06-12 21:41:01,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884771615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176272117] [2021-06-12 21:41:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:01,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:41:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:02,179 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176272117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:02,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:02,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955735932] [2021-06-12 21:41:02,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:02,530 INFO L87 Difference]: Start difference. First operand 1631 states and 7461 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:03,277 INFO L93 Difference]: Finished difference Result 1696 states and 7604 transitions. [2021-06-12 21:41:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:41:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:03,280 INFO L225 Difference]: With dead ends: 1696 [2021-06-12 21:41:03,280 INFO L226 Difference]: Without dead ends: 1692 [2021-06-12 21:41:03,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1482.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:41:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-06-12 21:41:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1622. [2021-06-12 21:41:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.586057988895743) internal successors, (7434), 1621 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7434 transitions. [2021-06-12 21:41:03,301 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7434 transitions. Word has length 28 [2021-06-12 21:41:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:03,302 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7434 transitions. [2021-06-12 21:41:03,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7434 transitions. [2021-06-12 21:41:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:03,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:03,304 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:03,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-12 21:41:03,504 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2138980049, now seen corresponding path program 154 times [2021-06-12 21:41:03,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:03,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453916949] [2021-06-12 21:41:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453916949] [2021-06-12 21:41:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453916949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380460918] [2021-06-12 21:41:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:03,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:03,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:04,264 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:04,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380460918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:04,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:04,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:04,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632353847] [2021-06-12 21:41:04,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:04,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:04,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:04,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:04,717 INFO L87 Difference]: Start difference. First operand 1622 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:05,331 INFO L93 Difference]: Finished difference Result 1654 states and 7498 transitions. [2021-06-12 21:41:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:41:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:05,334 INFO L225 Difference]: With dead ends: 1654 [2021-06-12 21:41:05,334 INFO L226 Difference]: Without dead ends: 1650 [2021-06-12 21:41:05,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1360.6ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:41:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-12 21:41:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1618. [2021-06-12 21:41:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.587507730364873) internal successors, (7418), 1617 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7418 transitions. [2021-06-12 21:41:05,355 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7418 transitions. Word has length 28 [2021-06-12 21:41:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:05,355 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7418 transitions. [2021-06-12 21:41:05,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7418 transitions. [2021-06-12 21:41:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:05,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:05,357 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:05,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:05,558 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -196758805, now seen corresponding path program 155 times [2021-06-12 21:41:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:05,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203330543] [2021-06-12 21:41:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:05,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203330543] [2021-06-12 21:41:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203330543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390438466] [2021-06-12 21:41:05,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:05,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:41:05,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:06,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390438466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:06,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:06,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:06,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078955280] [2021-06-12 21:41:06,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:06,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:06,656 INFO L87 Difference]: Start difference. First operand 1618 states and 7418 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:06,904 INFO L93 Difference]: Finished difference Result 1650 states and 7490 transitions. [2021-06-12 21:41:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:41:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:06,907 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 21:41:06,907 INFO L226 Difference]: Without dead ends: 1646 [2021-06-12 21:41:06,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 897.7ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-12 21:41:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1610. [2021-06-12 21:41:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 4.599129894344313) internal successors, (7400), 1609 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 7400 transitions. [2021-06-12 21:41:06,930 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 7400 transitions. Word has length 28 [2021-06-12 21:41:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:06,930 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 7400 transitions. [2021-06-12 21:41:06,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 7400 transitions. [2021-06-12 21:41:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:06,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:06,933 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:07,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-12 21:41:07,133 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1332363625, now seen corresponding path program 156 times [2021-06-12 21:41:07,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:07,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254355598] [2021-06-12 21:41:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:07,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:07,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254355598] [2021-06-12 21:41:07,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254355598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:07,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997830238] [2021-06-12 21:41:07,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:07,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:41:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:07,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:41:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997830238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:08,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:08,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:41:08,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765154418] [2021-06-12 21:41:08,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:41:08,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:41:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:41:08,002 INFO L87 Difference]: Start difference. First operand 1610 states and 7400 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:08,377 INFO L93 Difference]: Finished difference Result 1574 states and 7191 transitions. [2021-06-12 21:41:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:41:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:08,380 INFO L225 Difference]: With dead ends: 1574 [2021-06-12 21:41:08,380 INFO L226 Difference]: Without dead ends: 1559 [2021-06-12 21:41:08,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:41:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-12 21:41:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1531. [2021-06-12 21:41:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 4.633986928104576) internal successors, (7090), 1530 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 7090 transitions. [2021-06-12 21:41:08,400 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 7090 transitions. Word has length 28 [2021-06-12 21:41:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:08,401 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 7090 transitions. [2021-06-12 21:41:08,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 7090 transitions. [2021-06-12 21:41:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:08,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:08,403 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:08,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-12 21:41:08,603 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2110291579, now seen corresponding path program 157 times [2021-06-12 21:41:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:08,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529297024] [2021-06-12 21:41:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529297024] [2021-06-12 21:41:08,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529297024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137448670] [2021-06-12 21:41:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:41:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:09,454 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137448670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:09,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:09,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885485476] [2021-06-12 21:41:09,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:09,823 INFO L87 Difference]: Start difference. First operand 1531 states and 7090 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,399 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-12 21:41:10,573 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-12 21:41:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:10,670 INFO L93 Difference]: Finished difference Result 1578 states and 7201 transitions. [2021-06-12 21:41:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:41:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:10,673 INFO L225 Difference]: With dead ends: 1578 [2021-06-12 21:41:10,673 INFO L226 Difference]: Without dead ends: 1574 [2021-06-12 21:41:10,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1587.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:41:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-12 21:41:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1538. [2021-06-12 21:41:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 4.62654521795706) internal successors, (7111), 1537 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 7111 transitions. [2021-06-12 21:41:10,694 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 7111 transitions. Word has length 28 [2021-06-12 21:41:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:10,694 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 7111 transitions. [2021-06-12 21:41:10,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 7111 transitions. [2021-06-12 21:41:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:10,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:10,696 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:10,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-12 21:41:10,896 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1647182861, now seen corresponding path program 158 times [2021-06-12 21:41:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:10,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080739946] [2021-06-12 21:41:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:11,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080739946] [2021-06-12 21:41:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080739946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990869459] [2021-06-12 21:41:11,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:11,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:11,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:41:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:11,568 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 21:41:11,725 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:12,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990869459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:12,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:12,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:12,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384484432] [2021-06-12 21:41:12,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:12,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:12,216 INFO L87 Difference]: Start difference. First operand 1538 states and 7111 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:13,002 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-12 21:41:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:13,215 INFO L93 Difference]: Finished difference Result 1586 states and 7223 transitions. [2021-06-12 21:41:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:41:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:13,218 INFO L225 Difference]: With dead ends: 1586 [2021-06-12 21:41:13,218 INFO L226 Difference]: Without dead ends: 1582 [2021-06-12 21:41:13,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1827.9ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:41:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-12 21:41:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1544. [2021-06-12 21:41:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 4.620868438107583) internal successors, (7130), 1543 states have internal predecessors, (7130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 7130 transitions. [2021-06-12 21:41:13,238 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 7130 transitions. Word has length 28 [2021-06-12 21:41:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:13,238 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 7130 transitions. [2021-06-12 21:41:13,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 7130 transitions. [2021-06-12 21:41:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:13,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:13,240 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:13,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-12 21:41:13,442 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash -53750163, now seen corresponding path program 159 times [2021-06-12 21:41:13,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:13,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687575695] [2021-06-12 21:41:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:13,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:13,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687575695] [2021-06-12 21:41:13,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687575695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:13,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362244001] [2021-06-12 21:41:13,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:13,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:41:13,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:13,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362244001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:41:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167420415] [2021-06-12 21:41:14,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:41:14,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:41:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:41:14,147 INFO L87 Difference]: Start difference. First operand 1544 states and 7130 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:14,583 INFO L93 Difference]: Finished difference Result 1511 states and 6853 transitions. [2021-06-12 21:41:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:41:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:14,586 INFO L225 Difference]: With dead ends: 1511 [2021-06-12 21:41:14,586 INFO L226 Difference]: Without dead ends: 1493 [2021-06-12 21:41:14,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:41:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-12 21:41:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1466. [2021-06-12 21:41:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-12 21:41:14,604 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-12 21:41:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:14,604 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-12 21:41:14,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-12 21:41:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:14,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:14,606 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:14,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:14,807 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:14,807 INFO L82 PathProgramCache]: Analyzing trace with hash 798561929, now seen corresponding path program 160 times [2021-06-12 21:41:14,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:14,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568431503] [2021-06-12 21:41:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:15,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:15,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568431503] [2021-06-12 21:41:15,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568431503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:15,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755199417] [2021-06-12 21:41:15,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:15,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:41:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:15,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755199417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:15,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:15,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518700736] [2021-06-12 21:41:15,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:15,668 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:15,919 INFO L93 Difference]: Finished difference Result 1512 states and 6853 transitions. [2021-06-12 21:41:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:41:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:15,922 INFO L225 Difference]: With dead ends: 1512 [2021-06-12 21:41:15,922 INFO L226 Difference]: Without dead ends: 1508 [2021-06-12 21:41:15,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-12 21:41:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1468. [2021-06-12 21:41:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 4.5998636673483295) internal successors, (6748), 1467 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 6748 transitions. [2021-06-12 21:41:15,941 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 6748 transitions. Word has length 28 [2021-06-12 21:41:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:15,941 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 6748 transitions. [2021-06-12 21:41:15,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 6748 transitions. [2021-06-12 21:41:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:15,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:15,943 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:16,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:16,144 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1757016913, now seen corresponding path program 161 times [2021-06-12 21:41:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:16,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946653357] [2021-06-12 21:41:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:16,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946653357] [2021-06-12 21:41:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946653357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389221467] [2021-06-12 21:41:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:16,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:41:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389221467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:17,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:17,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:17,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503581567] [2021-06-12 21:41:17,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:17,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:17,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:17,137 INFO L87 Difference]: Start difference. First operand 1468 states and 6748 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:17,552 INFO L93 Difference]: Finished difference Result 1517 states and 6862 transitions. [2021-06-12 21:41:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:41:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:17,555 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 21:41:17,555 INFO L226 Difference]: Without dead ends: 1513 [2021-06-12 21:41:17,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1016.7ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:41:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-12 21:41:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-12 21:41:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-12 21:41:17,574 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-12 21:41:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:17,574 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-12 21:41:17,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-12 21:41:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:17,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:17,576 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:17,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:17,776 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884241, now seen corresponding path program 162 times [2021-06-12 21:41:17,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:17,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484922887] [2021-06-12 21:41:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:18,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484922887] [2021-06-12 21:41:18,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484922887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389339850] [2021-06-12 21:41:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:18,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:41:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389339850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:18,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:18,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441325032] [2021-06-12 21:41:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:18,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:18,703 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:19,352 INFO L93 Difference]: Finished difference Result 1519 states and 6864 transitions. [2021-06-12 21:41:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:41:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:19,355 INFO L225 Difference]: With dead ends: 1519 [2021-06-12 21:41:19,355 INFO L226 Difference]: Without dead ends: 1515 [2021-06-12 21:41:19,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1195.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:41:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-12 21:41:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1466. [2021-06-12 21:41:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-12 21:41:19,374 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-12 21:41:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:19,374 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-12 21:41:19,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-12 21:41:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:19,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:19,376 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:19,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:19,577 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088917, now seen corresponding path program 163 times [2021-06-12 21:41:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:19,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516484197] [2021-06-12 21:41:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:19,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516484197] [2021-06-12 21:41:19,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516484197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116179055] [2021-06-12 21:41:19,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:41:19,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:20,214 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:41:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:20,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116179055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:20,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:20,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:20,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454458978] [2021-06-12 21:41:20,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:20,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:20,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:20,695 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:21,170 INFO L93 Difference]: Finished difference Result 1517 states and 6858 transitions. [2021-06-12 21:41:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:41:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:21,172 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 21:41:21,173 INFO L226 Difference]: Without dead ends: 1513 [2021-06-12 21:41:21,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1109.6ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:41:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-12 21:41:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-12 21:41:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-12 21:41:21,191 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-12 21:41:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:21,191 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-12 21:41:21,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-12 21:41:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:21,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:21,193 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:21,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:21,394 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:21,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1768583857, now seen corresponding path program 164 times [2021-06-12 21:41:21,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:21,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56395962] [2021-06-12 21:41:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56395962] [2021-06-12 21:41:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56395962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530796414] [2021-06-12 21:41:21,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:21,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:41:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:22,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530796414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:22,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:22,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-12 21:41:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543951835] [2021-06-12 21:41:22,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:41:22,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:41:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:41:22,284 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:22,743 INFO L93 Difference]: Finished difference Result 1192 states and 5241 transitions. [2021-06-12 21:41:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:41:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:22,745 INFO L225 Difference]: With dead ends: 1192 [2021-06-12 21:41:22,745 INFO L226 Difference]: Without dead ends: 1168 [2021-06-12 21:41:22,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 999.3ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:41:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-12 21:41:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1151. [2021-06-12 21:41:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 4.472173913043478) internal successors, (5143), 1150 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 5143 transitions. [2021-06-12 21:41:22,759 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 5143 transitions. Word has length 28 [2021-06-12 21:41:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 5143 transitions. [2021-06-12 21:41:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 5143 transitions. [2021-06-12 21:41:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:22,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:22,761 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:22,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:22,962 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash 108442159, now seen corresponding path program 165 times [2021-06-12 21:41:22,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:22,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767751775] [2021-06-12 21:41:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:23,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:23,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767751775] [2021-06-12 21:41:23,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767751775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116615012] [2021-06-12 21:41:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:41:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116615012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:24,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:24,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177093427] [2021-06-12 21:41:24,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:24,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:24,397 INFO L87 Difference]: Start difference. First operand 1151 states and 5143 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:24,989 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 21:41:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:25,090 INFO L93 Difference]: Finished difference Result 1185 states and 5217 transitions. [2021-06-12 21:41:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:41:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:25,093 INFO L225 Difference]: With dead ends: 1185 [2021-06-12 21:41:25,093 INFO L226 Difference]: Without dead ends: 1181 [2021-06-12 21:41:25,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1665.8ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:41:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-12 21:41:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1145. [2021-06-12 21:41:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 4.481643356643357) internal successors, (5127), 1144 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 5127 transitions. [2021-06-12 21:41:25,107 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 5127 transitions. Word has length 28 [2021-06-12 21:41:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:25,107 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 5127 transitions. [2021-06-12 21:41:25,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 5127 transitions. [2021-06-12 21:41:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:25,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:25,109 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:25,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:25,309 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1805090615, now seen corresponding path program 166 times [2021-06-12 21:41:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:25,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290056203] [2021-06-12 21:41:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:25,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:25,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290056203] [2021-06-12 21:41:25,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290056203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:25,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366094553] [2021-06-12 21:41:25,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:25,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:25,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:41:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:26,098 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:26,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366094553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:26,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:26,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:41:26,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008004477] [2021-06-12 21:41:26,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:26,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:26,452 INFO L87 Difference]: Start difference. First operand 1145 states and 5127 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:26,961 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-12 21:41:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:27,058 INFO L93 Difference]: Finished difference Result 1180 states and 5202 transitions. [2021-06-12 21:41:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:41:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:27,060 INFO L225 Difference]: With dead ends: 1180 [2021-06-12 21:41:27,060 INFO L226 Difference]: Without dead ends: 1176 [2021-06-12 21:41:27,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1358.6ms TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:41:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-12 21:41:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2021-06-12 21:41:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 4.493827160493828) internal successors, (5096), 1134 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 5096 transitions. [2021-06-12 21:41:27,074 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 5096 transitions. Word has length 28 [2021-06-12 21:41:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:27,074 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 5096 transitions. [2021-06-12 21:41:27,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 5096 transitions. [2021-06-12 21:41:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:41:27,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:27,075 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:27,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:27,276 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1952383825, now seen corresponding path program 167 times [2021-06-12 21:41:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:27,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907313251] [2021-06-12 21:41:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:27,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:27,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907313251] [2021-06-12 21:41:27,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907313251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:27,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620190545] [2021-06-12 21:41:27,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:27,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:41:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:27,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:28,174 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:41:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:28,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620190545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:28,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:28,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890416579] [2021-06-12 21:41:28,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:28,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:28,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:28,609 INFO L87 Difference]: Start difference. First operand 1135 states and 5096 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:29,324 INFO L93 Difference]: Finished difference Result 1168 states and 5162 transitions. [2021-06-12 21:41:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:41:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:41:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:29,326 INFO L225 Difference]: With dead ends: 1168 [2021-06-12 21:41:29,326 INFO L226 Difference]: Without dead ends: 1164 [2021-06-12 21:41:29,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1509.1ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:41:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-12 21:41:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1112. [2021-06-12 21:41:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 4.53015301530153) internal successors, (5033), 1111 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 5033 transitions. [2021-06-12 21:41:29,340 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 5033 transitions. Word has length 28 [2021-06-12 21:41:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:29,340 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 5033 transitions. [2021-06-12 21:41:29,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 5033 transitions. [2021-06-12 21:41:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:29,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:29,341 INFO L472 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:29,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-12 21:41:29,542 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1451861432, now seen corresponding path program 168 times [2021-06-12 21:41:29,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:29,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075139549] [2021-06-12 21:41:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:41:29,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075139549] [2021-06-12 21:41:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075139549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233038189] [2021-06-12 21:41:29,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:29,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:41:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:41:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:30,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:41:30,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:30,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:30,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:41:30,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:30,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:30,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:41:30,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:30,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:30,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:41:30,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:30,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:30,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:41:30,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:123, output treesize:95 [2021-06-12 21:41:46,602 WARN L205 SmtUtils]: Spent 16.07 s on a formula simplification that was a NOOP. DAG size: 57 [2021-06-12 21:41:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233038189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:46,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:46,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-12 21:41:46,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7558270] [2021-06-12 21:41:46,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:46,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:46,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:46,617 INFO L87 Difference]: Start difference. First operand 1112 states and 5033 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:46,933 INFO L93 Difference]: Finished difference Result 2488 states and 10938 transitions. [2021-06-12 21:41:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:41:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:46,938 INFO L225 Difference]: With dead ends: 2488 [2021-06-12 21:41:46,938 INFO L226 Difference]: Without dead ends: 2422 [2021-06-12 21:41:46,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 16731.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:41:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-12 21:41:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1684. [2021-06-12 21:41:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 4.7260843731431965) internal successors, (7954), 1683 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 7954 transitions. [2021-06-12 21:41:46,966 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 7954 transitions. Word has length 29 [2021-06-12 21:41:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:46,966 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 7954 transitions. [2021-06-12 21:41:46,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 7954 transitions. [2021-06-12 21:41:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:46,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:46,968 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-12 21:41:47,169 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -462072546, now seen corresponding path program 169 times [2021-06-12 21:41:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950036087] [2021-06-12 21:41:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:47,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950036087] [2021-06-12 21:41:47,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950036087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907580553] [2021-06-12 21:41:47,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:47,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907580553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:48,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:48,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:41:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613033512] [2021-06-12 21:41:48,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:41:48,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:41:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:41:48,360 INFO L87 Difference]: Start difference. First operand 1684 states and 7954 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:48,733 INFO L93 Difference]: Finished difference Result 1831 states and 8338 transitions. [2021-06-12 21:41:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:41:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:48,736 INFO L225 Difference]: With dead ends: 1831 [2021-06-12 21:41:48,736 INFO L226 Difference]: Without dead ends: 1814 [2021-06-12 21:41:48,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1097.6ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:41:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-06-12 21:41:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1728. [2021-06-12 21:41:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 4.672264041690793) internal successors, (8069), 1727 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 8069 transitions. [2021-06-12 21:41:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 8069 transitions. Word has length 29 [2021-06-12 21:41:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:48,761 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 8069 transitions. [2021-06-12 21:41:48,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 8069 transitions. [2021-06-12 21:41:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:48,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:48,763 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:48,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-12 21:41:48,964 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash 347953604, now seen corresponding path program 170 times [2021-06-12 21:41:48,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:48,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043381779] [2021-06-12 21:41:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:49,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:49,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043381779] [2021-06-12 21:41:49,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043381779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:49,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598819437] [2021-06-12 21:41:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:49,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:49,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:49,868 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 21:41:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598819437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:50,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:41:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009749971] [2021-06-12 21:41:50,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:41:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:41:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:41:50,347 INFO L87 Difference]: Start difference. First operand 1728 states and 8069 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:51,152 INFO L93 Difference]: Finished difference Result 1769 states and 8177 transitions. [2021-06-12 21:41:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:41:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:51,156 INFO L225 Difference]: With dead ends: 1769 [2021-06-12 21:41:51,156 INFO L226 Difference]: Without dead ends: 1762 [2021-06-12 21:41:51,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1674.8ms TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:41:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-06-12 21:41:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1751. [2021-06-12 21:41:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 4.646857142857143) internal successors, (8132), 1750 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 8132 transitions. [2021-06-12 21:41:51,179 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 8132 transitions. Word has length 29 [2021-06-12 21:41:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:51,179 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 8132 transitions. [2021-06-12 21:41:51,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 8132 transitions. [2021-06-12 21:41:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:51,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:51,182 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:51,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-12 21:41:51,382 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash 865544252, now seen corresponding path program 171 times [2021-06-12 21:41:51,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:51,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250473381] [2021-06-12 21:41:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:51,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:51,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250473381] [2021-06-12 21:41:51,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250473381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020532957] [2021-06-12 21:41:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:51,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:41:51,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:52,284 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:41:52,460 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 21:41:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:52,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020532957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:52,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:52,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:41:52,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956280539] [2021-06-12 21:41:52,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:41:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:41:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:41:52,793 INFO L87 Difference]: Start difference. First operand 1751 states and 8132 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,351 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 21:41:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:53,713 INFO L93 Difference]: Finished difference Result 1810 states and 8279 transitions. [2021-06-12 21:41:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:41:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:53,717 INFO L225 Difference]: With dead ends: 1810 [2021-06-12 21:41:53,717 INFO L226 Difference]: Without dead ends: 1798 [2021-06-12 21:41:53,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1850.7ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:41:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-12 21:41:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1769. [2021-06-12 21:41:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 4.628393665158371) internal successors, (8183), 1768 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 8183 transitions. [2021-06-12 21:41:53,739 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 8183 transitions. Word has length 29 [2021-06-12 21:41:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:53,739 INFO L482 AbstractCegarLoop]: Abstraction has 1769 states and 8183 transitions. [2021-06-12 21:41:53,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 8183 transitions. [2021-06-12 21:41:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:53,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:53,742 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:53,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:53,942 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash 328099136, now seen corresponding path program 172 times [2021-06-12 21:41:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952423048] [2021-06-12 21:41:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:54,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952423048] [2021-06-12 21:41:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952423048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720578769] [2021-06-12 21:41:54,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:54,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:54,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:41:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720578769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:54,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:54,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:41:54,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103909967] [2021-06-12 21:41:54,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:41:54,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:41:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:41:54,893 INFO L87 Difference]: Start difference. First operand 1769 states and 8183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:55,958 INFO L93 Difference]: Finished difference Result 2432 states and 10664 transitions. [2021-06-12 21:41:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:41:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:55,963 INFO L225 Difference]: With dead ends: 2432 [2021-06-12 21:41:55,963 INFO L226 Difference]: Without dead ends: 2349 [2021-06-12 21:41:55,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1514.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:41:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-12 21:41:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1981. [2021-06-12 21:41:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 4.653030303030303) internal successors, (9213), 1980 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 9213 transitions. [2021-06-12 21:41:56,011 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 9213 transitions. Word has length 29 [2021-06-12 21:41:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:56,012 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 9213 transitions. [2021-06-12 21:41:56,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 9213 transitions. [2021-06-12 21:41:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:56,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:56,015 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:56,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:56,216 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1585433638, now seen corresponding path program 173 times [2021-06-12 21:41:56,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:56,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56576745] [2021-06-12 21:41:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:56,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56576745] [2021-06-12 21:41:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56576745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695977241] [2021-06-12 21:41:56,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:56,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:41:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:56,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:57,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695977241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:57,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:57,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:41:57,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862293009] [2021-06-12 21:41:57,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:41:57,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:41:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:41:57,550 INFO L87 Difference]: Start difference. First operand 1981 states and 9213 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:58,860 INFO L93 Difference]: Finished difference Result 2286 states and 10241 transitions. [2021-06-12 21:41:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:41:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:41:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:58,865 INFO L225 Difference]: With dead ends: 2286 [2021-06-12 21:41:58,865 INFO L226 Difference]: Without dead ends: 2194 [2021-06-12 21:41:58,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1968.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:41:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-06-12 21:41:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2066. [2021-06-12 21:41:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.632445520581114) internal successors, (9566), 2065 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 9566 transitions. [2021-06-12 21:41:58,906 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 9566 transitions. Word has length 29 [2021-06-12 21:41:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:58,906 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 9566 transitions. [2021-06-12 21:41:58,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 9566 transitions. [2021-06-12 21:41:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:41:58,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:58,909 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:59,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:59,109 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash 89744602, now seen corresponding path program 174 times [2021-06-12 21:41:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:59,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845697703] [2021-06-12 21:41:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:59,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:59,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845697703] [2021-06-12 21:41:59,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845697703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:59,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103796488] [2021-06-12 21:41:59,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:59,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:41:59,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:00,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103796488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:00,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:00,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793740602] [2021-06-12 21:42:00,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:00,187 INFO L87 Difference]: Start difference. First operand 2066 states and 9566 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:00,693 INFO L93 Difference]: Finished difference Result 2244 states and 10109 transitions. [2021-06-12 21:42:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:00,694 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:00,698 INFO L225 Difference]: With dead ends: 2244 [2021-06-12 21:42:00,698 INFO L226 Difference]: Without dead ends: 2232 [2021-06-12 21:42:00,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1144.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:42:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-12 21:42:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2102. [2021-06-12 21:42:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 4.627796287482151) internal successors, (9723), 2101 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 9723 transitions. [2021-06-12 21:42:00,726 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 9723 transitions. Word has length 29 [2021-06-12 21:42:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:00,726 INFO L482 AbstractCegarLoop]: Abstraction has 2102 states and 9723 transitions. [2021-06-12 21:42:00,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 9723 transitions. [2021-06-12 21:42:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:00,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:00,729 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:00,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-12 21:42:00,938 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash -477534946, now seen corresponding path program 175 times [2021-06-12 21:42:00,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:00,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215048704] [2021-06-12 21:42:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:01,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215048704] [2021-06-12 21:42:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215048704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617857410] [2021-06-12 21:42:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:01,818 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 21:42:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:02,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617857410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:02,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:02,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:02,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147092233] [2021-06-12 21:42:02,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:02,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:02,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:02,188 INFO L87 Difference]: Start difference. First operand 2102 states and 9723 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:03,297 INFO L93 Difference]: Finished difference Result 2144 states and 9820 transitions. [2021-06-12 21:42:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:42:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:03,301 INFO L225 Difference]: With dead ends: 2144 [2021-06-12 21:42:03,301 INFO L226 Difference]: Without dead ends: 2132 [2021-06-12 21:42:03,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1854.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:42:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-06-12 21:42:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2103. [2021-06-12 21:42:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.627021883920076) internal successors, (9726), 2102 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9726 transitions. [2021-06-12 21:42:03,330 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9726 transitions. Word has length 29 [2021-06-12 21:42:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:03,330 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 9726 transitions. [2021-06-12 21:42:03,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9726 transitions. [2021-06-12 21:42:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:03,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:03,333 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:03,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:03,534 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1199394428, now seen corresponding path program 176 times [2021-06-12 21:42:03,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:03,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315754921] [2021-06-12 21:42:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:03,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:03,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315754921] [2021-06-12 21:42:03,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315754921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357653933] [2021-06-12 21:42:03,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:03,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:04,389 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 21:42:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:04,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357653933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:04,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:04,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:04,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010694392] [2021-06-12 21:42:04,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:04,802 INFO L87 Difference]: Start difference. First operand 2103 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:05,324 INFO L93 Difference]: Finished difference Result 2149 states and 9838 transitions. [2021-06-12 21:42:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:42:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:05,328 INFO L225 Difference]: With dead ends: 2149 [2021-06-12 21:42:05,328 INFO L226 Difference]: Without dead ends: 2142 [2021-06-12 21:42:05,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1319.6ms TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:42:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-06-12 21:42:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2114. [2021-06-12 21:42:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.613819214387127) internal successors, (9749), 2113 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9749 transitions. [2021-06-12 21:42:05,355 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9749 transitions. Word has length 29 [2021-06-12 21:42:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:05,355 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 9749 transitions. [2021-06-12 21:42:05,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9749 transitions. [2021-06-12 21:42:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:05,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:05,358 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:05,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-12 21:42:05,558 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash -714138346, now seen corresponding path program 177 times [2021-06-12 21:42:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:05,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33650136] [2021-06-12 21:42:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:05,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:05,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33650136] [2021-06-12 21:42:05,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33650136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:05,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923902420] [2021-06-12 21:42:05,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:05,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:42:05,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:06,335 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 21:42:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:06,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923902420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:06,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:06,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527642989] [2021-06-12 21:42:06,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:06,729 INFO L87 Difference]: Start difference. First operand 2114 states and 9749 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:08,032 INFO L93 Difference]: Finished difference Result 2362 states and 10569 transitions. [2021-06-12 21:42:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:42:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:08,036 INFO L225 Difference]: With dead ends: 2362 [2021-06-12 21:42:08,036 INFO L226 Difference]: Without dead ends: 2294 [2021-06-12 21:42:08,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1925.2ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:42:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-12 21:42:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2155. [2021-06-12 21:42:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 4.589136490250697) internal successors, (9885), 2154 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 9885 transitions. [2021-06-12 21:42:08,066 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 9885 transitions. Word has length 29 [2021-06-12 21:42:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:08,066 INFO L482 AbstractCegarLoop]: Abstraction has 2155 states and 9885 transitions. [2021-06-12 21:42:08,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 9885 transitions. [2021-06-12 21:42:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:08,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:08,070 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:08,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-12 21:42:08,270 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash 961039894, now seen corresponding path program 178 times [2021-06-12 21:42:08,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:08,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805019488] [2021-06-12 21:42:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:08,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805019488] [2021-06-12 21:42:08,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805019488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332741967] [2021-06-12 21:42:08,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:08,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332741967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177260138] [2021-06-12 21:42:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:09,249 INFO L87 Difference]: Start difference. First operand 2155 states and 9885 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:09,593 INFO L93 Difference]: Finished difference Result 2204 states and 10013 transitions. [2021-06-12 21:42:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:42:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:09,597 INFO L225 Difference]: With dead ends: 2204 [2021-06-12 21:42:09,597 INFO L226 Difference]: Without dead ends: 2197 [2021-06-12 21:42:09,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-06-12 21:42:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2167. [2021-06-12 21:42:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 4.577562326869806) internal successors, (9915), 2166 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 9915 transitions. [2021-06-12 21:42:09,629 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 9915 transitions. Word has length 29 [2021-06-12 21:42:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:09,629 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 9915 transitions. [2021-06-12 21:42:09,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 9915 transitions. [2021-06-12 21:42:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:09,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:09,632 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:09,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:09,832 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 393760346, now seen corresponding path program 179 times [2021-06-12 21:42:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:09,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931135217] [2021-06-12 21:42:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:10,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:10,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931135217] [2021-06-12 21:42:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931135217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:10,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595993903] [2021-06-12 21:42:10,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:10,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:42:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595993903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:10,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686778067] [2021-06-12 21:42:10,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:10,928 INFO L87 Difference]: Start difference. First operand 2167 states and 9915 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:11,748 INFO L93 Difference]: Finished difference Result 2306 states and 10326 transitions. [2021-06-12 21:42:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:11,752 INFO L225 Difference]: With dead ends: 2306 [2021-06-12 21:42:11,752 INFO L226 Difference]: Without dead ends: 2254 [2021-06-12 21:42:11,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1392.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:42:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-12 21:42:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2187. [2021-06-12 21:42:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 4.562671546203111) internal successors, (9974), 2186 states have internal predecessors, (9974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9974 transitions. [2021-06-12 21:42:11,779 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9974 transitions. Word has length 29 [2021-06-12 21:42:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:11,779 INFO L482 AbstractCegarLoop]: Abstraction has 2187 states and 9974 transitions. [2021-06-12 21:42:11,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9974 transitions. [2021-06-12 21:42:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:11,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:11,782 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:11,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable792 [2021-06-12 21:42:11,982 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1672037662, now seen corresponding path program 180 times [2021-06-12 21:42:11,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955093075] [2021-06-12 21:42:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:12,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:12,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955093075] [2021-06-12 21:42:12,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955093075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:12,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066537945] [2021-06-12 21:42:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:12,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:42:12,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066537945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:13,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:13,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381638548] [2021-06-12 21:42:13,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:13,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:13,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:13,246 INFO L87 Difference]: Start difference. First operand 2187 states and 9974 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:14,211 INFO L93 Difference]: Finished difference Result 2348 states and 10539 transitions. [2021-06-12 21:42:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:14,212 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:14,216 INFO L225 Difference]: With dead ends: 2348 [2021-06-12 21:42:14,216 INFO L226 Difference]: Without dead ends: 2316 [2021-06-12 21:42:14,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1681.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:42:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-12 21:42:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2243. [2021-06-12 21:42:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 4.558876003568242) internal successors, (10221), 2242 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 10221 transitions. [2021-06-12 21:42:14,244 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 10221 transitions. Word has length 29 [2021-06-12 21:42:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:14,245 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 10221 transitions. [2021-06-12 21:42:14,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 10221 transitions. [2021-06-12 21:42:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:14,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:14,248 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:14,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-12 21:42:14,448 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1266240858, now seen corresponding path program 181 times [2021-06-12 21:42:14,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:14,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680044581] [2021-06-12 21:42:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:14,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:14,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680044581] [2021-06-12 21:42:14,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680044581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:14,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44806975] [2021-06-12 21:42:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:15,210 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-12 21:42:15,401 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:42:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:15,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44806975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:15,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:15,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:15,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472705765] [2021-06-12 21:42:15,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:15,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:15,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:15,785 INFO L87 Difference]: Start difference. First operand 2243 states and 10221 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:16,542 INFO L93 Difference]: Finished difference Result 2425 states and 10774 transitions. [2021-06-12 21:42:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:42:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:16,547 INFO L225 Difference]: With dead ends: 2425 [2021-06-12 21:42:16,547 INFO L226 Difference]: Without dead ends: 2413 [2021-06-12 21:42:16,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:42:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-12 21:42:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2246. [2021-06-12 21:42:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 4.564810690423163) internal successors, (10248), 2245 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 10248 transitions. [2021-06-12 21:42:16,577 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 10248 transitions. Word has length 29 [2021-06-12 21:42:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:16,577 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 10248 transitions. [2021-06-12 21:42:16,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 10248 transitions. [2021-06-12 21:42:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:16,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:16,581 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:16,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:16,782 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 698961310, now seen corresponding path program 182 times [2021-06-12 21:42:16,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:16,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664830948] [2021-06-12 21:42:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:17,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:17,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664830948] [2021-06-12 21:42:17,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664830948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:17,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434927364] [2021-06-12 21:42:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:17,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:17,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:18,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434927364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:18,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:18,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89982928] [2021-06-12 21:42:18,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:18,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:18,008 INFO L87 Difference]: Start difference. First operand 2246 states and 10248 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:18,729 INFO L93 Difference]: Finished difference Result 2282 states and 10326 transitions. [2021-06-12 21:42:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:42:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:18,734 INFO L225 Difference]: With dead ends: 2282 [2021-06-12 21:42:18,734 INFO L226 Difference]: Without dead ends: 2270 [2021-06-12 21:42:18,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1464.5ms TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:42:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-12 21:42:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2241. [2021-06-12 21:42:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.568303571428571) internal successors, (10233), 2240 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 10233 transitions. [2021-06-12 21:42:18,763 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 10233 transitions. Word has length 29 [2021-06-12 21:42:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:18,763 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 10233 transitions. [2021-06-12 21:42:18,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 10233 transitions. [2021-06-12 21:42:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:18,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:18,766 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:18,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-12 21:42:18,967 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 778277730, now seen corresponding path program 183 times [2021-06-12 21:42:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:18,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554828011] [2021-06-12 21:42:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:19,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554828011] [2021-06-12 21:42:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554828011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840547403] [2021-06-12 21:42:19,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:19,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:42:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840547403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:20,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:20,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:20,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673053244] [2021-06-12 21:42:20,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:20,243 INFO L87 Difference]: Start difference. First operand 2241 states and 10233 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:20,645 INFO L93 Difference]: Finished difference Result 2376 states and 10589 transitions. [2021-06-12 21:42:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:42:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:20,664 INFO L225 Difference]: With dead ends: 2376 [2021-06-12 21:42:20,664 INFO L226 Difference]: Without dead ends: 2359 [2021-06-12 21:42:20,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1206.7ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:42:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-12 21:42:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2234. [2021-06-12 21:42:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.5763546798029555) internal successors, (10219), 2233 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 10219 transitions. [2021-06-12 21:42:20,695 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 10219 transitions. Word has length 29 [2021-06-12 21:42:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:20,695 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 10219 transitions. [2021-06-12 21:42:20,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 10219 transitions. [2021-06-12 21:42:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:20,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:20,698 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:20,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:20,899 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1588303880, now seen corresponding path program 184 times [2021-06-12 21:42:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:20,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95429563] [2021-06-12 21:42:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:21,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95429563] [2021-06-12 21:42:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95429563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832083005] [2021-06-12 21:42:21,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:21,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:21,719 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:42:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:22,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832083005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:22,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:22,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:22,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845356185] [2021-06-12 21:42:22,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:22,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:22,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:22,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:22,062 INFO L87 Difference]: Start difference. First operand 2234 states and 10219 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:22,590 INFO L93 Difference]: Finished difference Result 2561 states and 11409 transitions. [2021-06-12 21:42:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:22,595 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 21:42:22,595 INFO L226 Difference]: Without dead ends: 2547 [2021-06-12 21:42:22,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1281.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:42:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-06-12 21:42:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2320. [2021-06-12 21:42:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.567917205692108) internal successors, (10593), 2319 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 10593 transitions. [2021-06-12 21:42:22,628 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 10593 transitions. Word has length 29 [2021-06-12 21:42:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:22,628 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 10593 transitions. [2021-06-12 21:42:22,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 10593 transitions. [2021-06-12 21:42:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:22,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:22,632 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:22,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-12 21:42:22,832 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2105894528, now seen corresponding path program 185 times [2021-06-12 21:42:22,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:22,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616519596] [2021-06-12 21:42:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:23,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:23,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616519596] [2021-06-12 21:42:23,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616519596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:23,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485246106] [2021-06-12 21:42:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:23,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:42:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:23,781 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:42:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485246106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:24,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:24,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474642376] [2021-06-12 21:42:24,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:24,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:24,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:24,289 INFO L87 Difference]: Start difference. First operand 2320 states and 10593 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:24,934 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-12 21:42:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:25,551 INFO L93 Difference]: Finished difference Result 2477 states and 11087 transitions. [2021-06-12 21:42:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:25,555 INFO L225 Difference]: With dead ends: 2477 [2021-06-12 21:42:25,556 INFO L226 Difference]: Without dead ends: 2467 [2021-06-12 21:42:25,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2154.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:42:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-12 21:42:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2342. [2021-06-12 21:42:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.553182400683468) internal successors, (10659), 2341 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10659 transitions. [2021-06-12 21:42:25,587 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10659 transitions. Word has length 29 [2021-06-12 21:42:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:25,588 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10659 transitions. [2021-06-12 21:42:25,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10659 transitions. [2021-06-12 21:42:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:25,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:25,591 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:25,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:25,792 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1568449412, now seen corresponding path program 186 times [2021-06-12 21:42:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:25,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688503769] [2021-06-12 21:42:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:26,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688503769] [2021-06-12 21:42:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688503769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391882902] [2021-06-12 21:42:26,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:26,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:42:26,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391882902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:26,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:26,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:26,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408646411] [2021-06-12 21:42:26,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:26,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:26,880 INFO L87 Difference]: Start difference. First operand 2342 states and 10659 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:27,383 INFO L93 Difference]: Finished difference Result 2387 states and 10797 transitions. [2021-06-12 21:42:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:42:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:27,388 INFO L225 Difference]: With dead ends: 2387 [2021-06-12 21:42:27,388 INFO L226 Difference]: Without dead ends: 2382 [2021-06-12 21:42:27,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1081.4ms TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:42:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-12 21:42:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2340. [2021-06-12 21:42:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 4.555365540829414) internal successors, (10655), 2339 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 10655 transitions. [2021-06-12 21:42:27,422 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 10655 transitions. Word has length 29 [2021-06-12 21:42:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:27,422 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 10655 transitions. [2021-06-12 21:42:27,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 10655 transitions. [2021-06-12 21:42:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:27,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:27,425 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:27,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-06-12 21:42:27,626 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash -345083362, now seen corresponding path program 187 times [2021-06-12 21:42:27,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:27,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687097781] [2021-06-12 21:42:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:27,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687097781] [2021-06-12 21:42:27,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687097781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:27,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176163207] [2021-06-12 21:42:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176163207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:28,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:28,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600357005] [2021-06-12 21:42:28,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:28,814 INFO L87 Difference]: Start difference. First operand 2340 states and 10655 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:29,374 INFO L93 Difference]: Finished difference Result 2400 states and 10829 transitions. [2021-06-12 21:42:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:42:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:29,379 INFO L225 Difference]: With dead ends: 2400 [2021-06-12 21:42:29,379 INFO L226 Difference]: Without dead ends: 2395 [2021-06-12 21:42:29,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1297.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:42:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-12 21:42:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2347. [2021-06-12 21:42:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.549872122762149) internal successors, (10674), 2346 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 10674 transitions. [2021-06-12 21:42:29,411 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 10674 transitions. Word has length 29 [2021-06-12 21:42:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:29,411 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 10674 transitions. [2021-06-12 21:42:29,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 10674 transitions. [2021-06-12 21:42:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:29,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:29,415 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:29,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:29,615 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1330094878, now seen corresponding path program 188 times [2021-06-12 21:42:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:29,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384476992] [2021-06-12 21:42:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:29,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384476992] [2021-06-12 21:42:29,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384476992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408588087] [2021-06-12 21:42:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:29,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:29,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:29,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:30,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408588087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:30,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:30,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244796097] [2021-06-12 21:42:30,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:30,687 INFO L87 Difference]: Start difference. First operand 2347 states and 10674 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:31,207 INFO L93 Difference]: Finished difference Result 2388 states and 10783 transitions. [2021-06-12 21:42:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:42:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:31,212 INFO L225 Difference]: With dead ends: 2388 [2021-06-12 21:42:31,212 INFO L226 Difference]: Without dead ends: 2381 [2021-06-12 21:42:31,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1176.9ms TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:42:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-12 21:42:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-06-12 21:42:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.5489778534923335) internal successors, (10681), 2348 states have internal predecessors, (10681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10681 transitions. [2021-06-12 21:42:31,241 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10681 transitions. Word has length 29 [2021-06-12 21:42:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:31,241 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10681 transitions. [2021-06-12 21:42:31,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10681 transitions. [2021-06-12 21:42:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:31,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:31,245 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:31,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:31,445 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 762815330, now seen corresponding path program 189 times [2021-06-12 21:42:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:31,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103322774] [2021-06-12 21:42:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:31,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:31,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103322774] [2021-06-12 21:42:31,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103322774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:31,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312661067] [2021-06-12 21:42:31,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:31,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:42:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312661067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:32,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:32,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345438213] [2021-06-12 21:42:32,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:32,731 INFO L87 Difference]: Start difference. First operand 2349 states and 10681 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:33,716 INFO L93 Difference]: Finished difference Result 2416 states and 10917 transitions. [2021-06-12 21:42:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:42:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:33,720 INFO L225 Difference]: With dead ends: 2416 [2021-06-12 21:42:33,720 INFO L226 Difference]: Without dead ends: 2406 [2021-06-12 21:42:33,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1714.9ms TimeCoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:42:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-06-12 21:42:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2356. [2021-06-12 21:42:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 4.548619957537155) internal successors, (10712), 2355 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 10712 transitions. [2021-06-12 21:42:33,750 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 10712 transitions. Word has length 29 [2021-06-12 21:42:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:33,750 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 10712 transitions. [2021-06-12 21:42:33,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 10712 transitions. [2021-06-12 21:42:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:33,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:33,754 INFO L472 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:33,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-12 21:42:33,954 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:33,954 INFO L82 PathProgramCache]: Analyzing trace with hash 659784136, now seen corresponding path program 190 times [2021-06-12 21:42:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:33,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925605319] [2021-06-12 21:42:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:42:34,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925605319] [2021-06-12 21:42:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925605319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983292447] [2021-06-12 21:42:34,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:34,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:34,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:34,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:42:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:34,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:34,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:34,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:34,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:34,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:34,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:34,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:42:34,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:85 [2021-06-12 21:42:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:34,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983292447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:34,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:34,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-12 21:42:34,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007874807] [2021-06-12 21:42:34,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:42:34,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:42:34,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:42:34,983 INFO L87 Difference]: Start difference. First operand 2356 states and 10712 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:35,372 INFO L93 Difference]: Finished difference Result 3321 states and 14808 transitions. [2021-06-12 21:42:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:42:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:35,378 INFO L225 Difference]: With dead ends: 3321 [2021-06-12 21:42:35,378 INFO L226 Difference]: Without dead ends: 3288 [2021-06-12 21:42:35,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-06-12 21:42:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2396. [2021-06-12 21:42:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 4.583298538622129) internal successors, (10977), 2395 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 10977 transitions. [2021-06-12 21:42:35,416 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 10977 transitions. Word has length 29 [2021-06-12 21:42:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:35,416 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 10977 transitions. [2021-06-12 21:42:35,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 10977 transitions. [2021-06-12 21:42:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:35,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:35,419 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:35,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:35,619 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:35,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1649573022, now seen corresponding path program 191 times [2021-06-12 21:42:35,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:35,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246441955] [2021-06-12 21:42:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246441955] [2021-06-12 21:42:36,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246441955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573583964] [2021-06-12 21:42:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:36,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:42:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573583964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:37,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:37,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:37,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373062144] [2021-06-12 21:42:37,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:37,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:37,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:37,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:37,065 INFO L87 Difference]: Start difference. First operand 2396 states and 10977 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:37,806 INFO L93 Difference]: Finished difference Result 2468 states and 11183 transitions. [2021-06-12 21:42:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:42:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:37,811 INFO L225 Difference]: With dead ends: 2468 [2021-06-12 21:42:37,811 INFO L226 Difference]: Without dead ends: 2452 [2021-06-12 21:42:37,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1613.4ms TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:42:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-12 21:42:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2414. [2021-06-12 21:42:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.571073352673021) internal successors, (11030), 2413 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 11030 transitions. [2021-06-12 21:42:37,844 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 11030 transitions. Word has length 29 [2021-06-12 21:42:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:37,844 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 11030 transitions. [2021-06-12 21:42:37,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 11030 transitions. [2021-06-12 21:42:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:37,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:37,848 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-12 21:42:38,048 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368124, now seen corresponding path program 192 times [2021-06-12 21:42:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:38,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585000119] [2021-06-12 21:42:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:38,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:38,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585000119] [2021-06-12 21:42:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585000119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:38,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876339223] [2021-06-12 21:42:38,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:38,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:42:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:39,113 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:42:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:39,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876339223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:39,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:39,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774890364] [2021-06-12 21:42:39,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:39,479 INFO L87 Difference]: Start difference. First operand 2414 states and 11030 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,380 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-12 21:42:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:40,772 INFO L93 Difference]: Finished difference Result 2778 states and 12392 transitions. [2021-06-12 21:42:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:42:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:40,777 INFO L225 Difference]: With dead ends: 2778 [2021-06-12 21:42:40,777 INFO L226 Difference]: Without dead ends: 2763 [2021-06-12 21:42:40,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2134.9ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:42:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-12 21:42:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2476. [2021-06-12 21:42:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.586262626262626) internal successors, (11351), 2475 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 11351 transitions. [2021-06-12 21:42:40,830 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 11351 transitions. Word has length 29 [2021-06-12 21:42:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:40,830 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 11351 transitions. [2021-06-12 21:42:40,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 11351 transitions. [2021-06-12 21:42:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:42:40,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:40,834 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:41,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:41,034 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1317777476, now seen corresponding path program 193 times [2021-06-12 21:42:41,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:41,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505344251] [2021-06-12 21:42:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:41,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505344251] [2021-06-12 21:42:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505344251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656255392] [2021-06-12 21:42:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:42:41,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:41,873 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 21:42:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:42,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656255392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:42,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:42,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:42:42,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52839751] [2021-06-12 21:42:42,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:42,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:42,317 INFO L87 Difference]: Start difference. First operand 2476 states and 11351 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:43,062 INFO L93 Difference]: Finished difference Result 2717 states and 12214 transitions. [2021-06-12 21:42:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:42:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:43,067 INFO L225 Difference]: With dead ends: 2717 [2021-06-12 21:42:43,068 INFO L226 Difference]: Without dead ends: 2698 [2021-06-12 21:42:43,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1468.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:42:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-12 21:42:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2508. [2021-06-12 21:42:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 4.594335859593139) internal successors, (11518), 2507 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 11518 transitions. [2021-06-12 21:42:43,105 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 11518 transitions. Word has length 29 [2021-06-12 21:42:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:43,105 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 11518 transitions. [2021-06-12 21:42:43,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 11518 transitions. [2021-06-12 21:42:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:43,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:43,109 INFO L472 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:43,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-12 21:42:43,310 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1438777063, now seen corresponding path program 194 times [2021-06-12 21:42:43,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:43,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064122586] [2021-06-12 21:42:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:43,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064122586] [2021-06-12 21:42:43,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064122586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677390234] [2021-06-12 21:42:43,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:43,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:42:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:44,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:44,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:44,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:44,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:44,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:44,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:44,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:44,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:44,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:44,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:44,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 21:42:44,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-12 21:42:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677390234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-12 21:42:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895498980] [2021-06-12 21:42:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:42:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:42:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:42:44,373 INFO L87 Difference]: Start difference. First operand 2508 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:45,730 INFO L93 Difference]: Finished difference Result 5624 states and 23716 transitions. [2021-06-12 21:42:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:42:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:45,741 INFO L225 Difference]: With dead ends: 5624 [2021-06-12 21:42:45,741 INFO L226 Difference]: Without dead ends: 5507 [2021-06-12 21:42:45,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1608.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:42:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-12 21:42:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 2890. [2021-06-12 21:42:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 4.747663551401869) internal successors, (13716), 2889 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 13716 transitions. [2021-06-12 21:42:45,825 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 13716 transitions. Word has length 30 [2021-06-12 21:42:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:45,825 INFO L482 AbstractCegarLoop]: Abstraction has 2890 states and 13716 transitions. [2021-06-12 21:42:45,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 13716 transitions. [2021-06-12 21:42:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:45,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:45,829 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:46,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:46,033 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1972399915, now seen corresponding path program 195 times [2021-06-12 21:42:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:46,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26662564] [2021-06-12 21:42:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:46,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:46,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26662564] [2021-06-12 21:42:46,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26662564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:46,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963851084] [2021-06-12 21:42:46,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:46,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:42:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:47,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963851084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:47,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:47,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:42:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220831849] [2021-06-12 21:42:47,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:42:47,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:47,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:42:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:47,492 INFO L87 Difference]: Start difference. First operand 2890 states and 13716 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:48,099 INFO L93 Difference]: Finished difference Result 2970 states and 13926 transitions. [2021-06-12 21:42:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:42:48,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:48,105 INFO L225 Difference]: With dead ends: 2970 [2021-06-12 21:42:48,105 INFO L226 Difference]: Without dead ends: 2942 [2021-06-12 21:42:48,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1605.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:42:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-12 21:42:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2916. [2021-06-12 21:42:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-12 21:42:48,148 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-12 21:42:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:48,148 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-12 21:42:48,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-12 21:42:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:48,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:48,152 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:48,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-12 21:42:48,353 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1663574255, now seen corresponding path program 196 times [2021-06-12 21:42:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857960173] [2021-06-12 21:42:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:48,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:48,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857960173] [2021-06-12 21:42:48,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857960173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889551568] [2021-06-12 21:42:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:48,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:48,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:49,387 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-12 21:42:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889551568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:49,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:49,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:42:49,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566603939] [2021-06-12 21:42:49,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:42:49,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:49,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:42:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:49,822 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:50,568 INFO L93 Difference]: Finished difference Result 2973 states and 13938 transitions. [2021-06-12 21:42:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:42:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:50,574 INFO L225 Difference]: With dead ends: 2973 [2021-06-12 21:42:50,574 INFO L226 Difference]: Without dead ends: 2964 [2021-06-12 21:42:50,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1658.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:42:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-12 21:42:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2916. [2021-06-12 21:42:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-12 21:42:50,633 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-12 21:42:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:50,633 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-12 21:42:50,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-12 21:42:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:50,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:50,637 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:50,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:50,838 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash -152141107, now seen corresponding path program 197 times [2021-06-12 21:42:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:50,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841470561] [2021-06-12 21:42:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:51,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841470561] [2021-06-12 21:42:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841470561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659635347] [2021-06-12 21:42:51,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:51,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:42:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:51,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:51,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:51,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:51,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:51,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:42:51,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:51,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:42:51,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-12 21:42:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:42:52,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659635347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:52,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:52,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:42:52,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391231934] [2021-06-12 21:42:52,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:42:52,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:52,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:42:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:42:52,074 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:52,621 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-12 21:42:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:53,011 INFO L93 Difference]: Finished difference Result 2877 states and 13430 transitions. [2021-06-12 21:42:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:42:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:53,016 INFO L225 Difference]: With dead ends: 2877 [2021-06-12 21:42:53,016 INFO L226 Difference]: Without dead ends: 2867 [2021-06-12 21:42:53,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1510.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:42:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-06-12 21:42:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2833. [2021-06-12 21:42:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 4.709039548022599) internal successors, (13336), 2832 states have internal predecessors, (13336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 13336 transitions. [2021-06-12 21:42:53,053 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 13336 transitions. Word has length 30 [2021-06-12 21:42:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:53,053 INFO L482 AbstractCegarLoop]: Abstraction has 2833 states and 13336 transitions. [2021-06-12 21:42:53,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 13336 transitions. [2021-06-12 21:42:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:53,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:53,057 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:53,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:53,257 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 529015159, now seen corresponding path program 198 times [2021-06-12 21:42:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:53,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876368864] [2021-06-12 21:42:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:53,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876368864] [2021-06-12 21:42:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876368864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748160111] [2021-06-12 21:42:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:53,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:42:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:53,968 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 21:42:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748160111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:54,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:54,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:42:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252387155] [2021-06-12 21:42:54,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:42:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:42:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:54,430 INFO L87 Difference]: Start difference. First operand 2833 states and 13336 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:55,363 INFO L93 Difference]: Finished difference Result 2924 states and 13557 transitions. [2021-06-12 21:42:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:42:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:55,368 INFO L225 Difference]: With dead ends: 2924 [2021-06-12 21:42:55,369 INFO L226 Difference]: Without dead ends: 2909 [2021-06-12 21:42:55,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1670.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:42:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-06-12 21:42:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2842. [2021-06-12 21:42:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 4.702569517775431) internal successors, (13360), 2841 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 13360 transitions. [2021-06-12 21:42:55,406 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 13360 transitions. Word has length 30 [2021-06-12 21:42:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:55,406 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 13360 transitions. [2021-06-12 21:42:55,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 13360 transitions. [2021-06-12 21:42:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:55,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:55,410 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:55,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:55,610 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2045937511, now seen corresponding path program 199 times [2021-06-12 21:42:55,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:55,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318597447] [2021-06-12 21:42:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:55,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318597447] [2021-06-12 21:42:55,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318597447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090868465] [2021-06-12 21:42:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:56,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090868465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:56,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:56,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:42:56,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367018385] [2021-06-12 21:42:56,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:42:56,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:56,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:42:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:56,744 INFO L87 Difference]: Start difference. First operand 2842 states and 13360 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:57,209 INFO L93 Difference]: Finished difference Result 2998 states and 13825 transitions. [2021-06-12 21:42:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:42:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:57,215 INFO L225 Difference]: With dead ends: 2998 [2021-06-12 21:42:57,215 INFO L226 Difference]: Without dead ends: 2980 [2021-06-12 21:42:57,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1119.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:42:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-06-12 21:42:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2021-06-12 21:42:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.696927374301676) internal successors, (13452), 2864 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13452 transitions. [2021-06-12 21:42:57,257 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13452 transitions. Word has length 30 [2021-06-12 21:42:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:57,257 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13452 transitions. [2021-06-12 21:42:57,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13452 transitions. [2021-06-12 21:42:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:57,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:57,261 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:57,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:57,462 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1843232981, now seen corresponding path program 200 times [2021-06-12 21:42:57,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:57,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551180364] [2021-06-12 21:42:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:57,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:57,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551180364] [2021-06-12 21:42:57,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551180364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:57,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614440528] [2021-06-12 21:42:57,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:57,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:57,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:58,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614440528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:58,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:58,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:42:58,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86664259] [2021-06-12 21:42:58,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:42:58,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:42:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:58,823 INFO L87 Difference]: Start difference. First operand 2865 states and 13452 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:59,615 INFO L93 Difference]: Finished difference Result 2907 states and 13565 transitions. [2021-06-12 21:42:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:42:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:59,620 INFO L225 Difference]: With dead ends: 2907 [2021-06-12 21:42:59,620 INFO L226 Difference]: Without dead ends: 2898 [2021-06-12 21:42:59,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1599.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:42:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-12 21:42:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2860. [2021-06-12 21:42:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 4.7037425673312345) internal successors, (13448), 2859 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 13448 transitions. [2021-06-12 21:42:59,660 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 13448 transitions. Word has length 30 [2021-06-12 21:42:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:59,660 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 13448 transitions. [2021-06-12 21:42:59,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 13448 transitions. [2021-06-12 21:42:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:59,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:59,664 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:59,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-06-12 21:42:59,865 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2006531273, now seen corresponding path program 201 times [2021-06-12 21:42:59,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:59,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587652633] [2021-06-12 21:42:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:00,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587652633] [2021-06-12 21:43:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587652633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986525703] [2021-06-12 21:43:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:00,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:43:00,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:00,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986525703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:01,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:01,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:01,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109769252] [2021-06-12 21:43:01,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:01,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:01,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:01,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:01,011 INFO L87 Difference]: Start difference. First operand 2860 states and 13448 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:01,627 INFO L93 Difference]: Finished difference Result 3156 states and 14386 transitions. [2021-06-12 21:43:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:43:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:01,633 INFO L225 Difference]: With dead ends: 3156 [2021-06-12 21:43:01,633 INFO L226 Difference]: Without dead ends: 3137 [2021-06-12 21:43:01,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1200.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:43:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-06-12 21:43:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2892. [2021-06-12 21:43:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 4.698374264960221) internal successors, (13583), 2891 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 13583 transitions. [2021-06-12 21:43:01,677 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 13583 transitions. Word has length 30 [2021-06-12 21:43:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:01,677 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 13583 transitions. [2021-06-12 21:43:01,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 13583 transitions. [2021-06-12 21:43:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:01,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:01,681 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:01,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:01,882 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash 472720661, now seen corresponding path program 202 times [2021-06-12 21:43:01,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:01,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639415311] [2021-06-12 21:43:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:02,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639415311] [2021-06-12 21:43:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639415311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450336327] [2021-06-12 21:43:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:02,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:43:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:43:02,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:02,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:02,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:02,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:02,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:02,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:02,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:02,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:02,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:02,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:43:02,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:81 [2021-06-12 21:43:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:43:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450336327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:02,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:02,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-06-12 21:43:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505703377] [2021-06-12 21:43:02,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:43:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:43:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:43:02,747 INFO L87 Difference]: Start difference. First operand 2892 states and 13583 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:07,539 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 21:43:11,665 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 21:43:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:12,027 INFO L93 Difference]: Finished difference Result 3764 states and 16651 transitions. [2021-06-12 21:43:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:43:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:12,034 INFO L225 Difference]: With dead ends: 3764 [2021-06-12 21:43:12,034 INFO L226 Difference]: Without dead ends: 3719 [2021-06-12 21:43:12,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9477.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:43:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-12 21:43:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3063. [2021-06-12 21:43:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.732854343566297) internal successors, (14492), 3062 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 14492 transitions. [2021-06-12 21:43:12,083 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 14492 transitions. Word has length 30 [2021-06-12 21:43:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:12,084 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 14492 transitions. [2021-06-12 21:43:12,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 14492 transitions. [2021-06-12 21:43:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:12,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:12,088 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:12,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:12,288 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:12,288 INFO L82 PathProgramCache]: Analyzing trace with hash -968323313, now seen corresponding path program 203 times [2021-06-12 21:43:12,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:12,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226300254] [2021-06-12 21:43:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:12,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:12,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226300254] [2021-06-12 21:43:12,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226300254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:12,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368561700] [2021-06-12 21:43:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:12,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:43:12,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:43:12,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:13,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:13,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:13,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:13,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:13,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:13,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:13,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:13,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-12 21:43:13,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:133, output treesize:105 [2021-06-12 21:43:15,535 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 21:43:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:43:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368561700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:15,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:15,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-12 21:43:15,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502270230] [2021-06-12 21:43:15,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:43:15,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:43:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:43:15,590 INFO L87 Difference]: Start difference. First operand 3063 states and 14492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:16,904 INFO L93 Difference]: Finished difference Result 3155 states and 14639 transitions. [2021-06-12 21:43:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:43:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:16,909 INFO L225 Difference]: With dead ends: 3155 [2021-06-12 21:43:16,909 INFO L226 Difference]: Without dead ends: 3139 [2021-06-12 21:43:16,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3309.5ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:43:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-12 21:43:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3053. [2021-06-12 21:43:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 4.734272608125819) internal successors, (14449), 3052 states have internal predecessors, (14449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 14449 transitions. [2021-06-12 21:43:16,951 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 14449 transitions. Word has length 30 [2021-06-12 21:43:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:16,951 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 14449 transitions. [2021-06-12 21:43:16,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 14449 transitions. [2021-06-12 21:43:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:16,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:16,955 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:17,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:17,156 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:17,156 INFO L82 PathProgramCache]: Analyzing trace with hash -805587235, now seen corresponding path program 204 times [2021-06-12 21:43:17,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:17,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136709480] [2021-06-12 21:43:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:17,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:17,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136709480] [2021-06-12 21:43:17,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136709480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:17,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987326096] [2021-06-12 21:43:17,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:17,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:43:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:18,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987326096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:18,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:18,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:18,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742314536] [2021-06-12 21:43:18,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:18,407 INFO L87 Difference]: Start difference. First operand 3053 states and 14449 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:20,018 INFO L93 Difference]: Finished difference Result 3587 states and 16130 transitions. [2021-06-12 21:43:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:43:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:20,026 INFO L225 Difference]: With dead ends: 3587 [2021-06-12 21:43:20,026 INFO L226 Difference]: Without dead ends: 3548 [2021-06-12 21:43:20,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2111.0ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:43:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-06-12 21:43:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3155. [2021-06-12 21:43:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 4.734939759036145) internal successors, (14934), 3154 states have internal predecessors, (14934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 14934 transitions. [2021-06-12 21:43:20,077 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 14934 transitions. Word has length 30 [2021-06-12 21:43:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 14934 transitions. [2021-06-12 21:43:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 14934 transitions. [2021-06-12 21:43:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:20,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:20,081 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:20,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-12 21:43:20,282 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1211384039, now seen corresponding path program 205 times [2021-06-12 21:43:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:20,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551498146] [2021-06-12 21:43:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:20,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:20,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551498146] [2021-06-12 21:43:20,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551498146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:20,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998716662] [2021-06-12 21:43:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:43:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:21,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998716662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:21,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:21,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:21,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308754854] [2021-06-12 21:43:21,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:21,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:21,636 INFO L87 Difference]: Start difference. First operand 3155 states and 14934 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:22,564 INFO L93 Difference]: Finished difference Result 3231 states and 15150 transitions. [2021-06-12 21:43:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:43:22,564 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:22,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:22,570 INFO L225 Difference]: With dead ends: 3231 [2021-06-12 21:43:22,570 INFO L226 Difference]: Without dead ends: 3213 [2021-06-12 21:43:22,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1763.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:43:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-06-12 21:43:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3160. [2021-06-12 21:43:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 4.733459955682178) internal successors, (14953), 3159 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 14953 transitions. [2021-06-12 21:43:22,616 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 14953 transitions. Word has length 30 [2021-06-12 21:43:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:22,616 INFO L482 AbstractCegarLoop]: Abstraction has 3160 states and 14953 transitions. [2021-06-12 21:43:22,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 14953 transitions. [2021-06-12 21:43:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:22,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:22,620 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:22,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-12 21:43:22,821 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 308768783, now seen corresponding path program 206 times [2021-06-12 21:43:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:22,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485053342] [2021-06-12 21:43:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:43:22,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:22,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485053342] [2021-06-12 21:43:22,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485053342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:22,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504155096] [2021-06-12 21:43:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:23,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:43:23,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:43:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:23,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:23,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:23,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:23,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:23,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:23,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:23,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:23,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:23,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-12 21:43:23,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-12 21:43:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:43:25,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504155096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:25,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:25,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-06-12 21:43:25,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501441960] [2021-06-12 21:43:25,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:43:25,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:43:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=483, Unknown=1, NotChecked=0, Total=552 [2021-06-12 21:43:25,872 INFO L87 Difference]: Start difference. First operand 3160 states and 14953 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:28,446 INFO L93 Difference]: Finished difference Result 3222 states and 15004 transitions. [2021-06-12 21:43:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:43:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:28,453 INFO L225 Difference]: With dead ends: 3222 [2021-06-12 21:43:28,453 INFO L226 Difference]: Without dead ends: 3214 [2021-06-12 21:43:28,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2893.2ms TimeCoverageRelationStatistics Valid=98, Invalid=771, Unknown=1, NotChecked=0, Total=870 [2021-06-12 21:43:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-12 21:43:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3123. [2021-06-12 21:43:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 4.721652786675208) internal successors, (14741), 3122 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 14741 transitions. [2021-06-12 21:43:28,500 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 14741 transitions. Word has length 30 [2021-06-12 21:43:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:28,500 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 14741 transitions. [2021-06-12 21:43:28,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 14741 transitions. [2021-06-12 21:43:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:28,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:28,504 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:28,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:28,704 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 65708057, now seen corresponding path program 207 times [2021-06-12 21:43:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:28,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332857865] [2021-06-12 21:43:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:29,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332857865] [2021-06-12 21:43:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332857865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118624642] [2021-06-12 21:43:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:29,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:43:29,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:29,541 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 21:43:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:29,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118624642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:29,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:29,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:29,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768067250] [2021-06-12 21:43:29,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:29,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:29,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:29,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:29,960 INFO L87 Difference]: Start difference. First operand 3123 states and 14741 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:30,480 INFO L93 Difference]: Finished difference Result 3173 states and 14878 transitions. [2021-06-12 21:43:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:43:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:30,489 INFO L225 Difference]: With dead ends: 3173 [2021-06-12 21:43:30,489 INFO L226 Difference]: Without dead ends: 3164 [2021-06-12 21:43:30,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:43:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-06-12 21:43:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3120. [2021-06-12 21:43:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 4.727476755370311) internal successors, (14745), 3119 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 14745 transitions. [2021-06-12 21:43:30,555 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 14745 transitions. Word has length 30 [2021-06-12 21:43:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:30,555 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 14745 transitions. [2021-06-12 21:43:30,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 14745 transitions. [2021-06-12 21:43:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:30,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:30,561 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:30,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-12 21:43:30,784 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -340088747, now seen corresponding path program 208 times [2021-06-12 21:43:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:30,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388666800] [2021-06-12 21:43:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:31,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388666800] [2021-06-12 21:43:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388666800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769285641] [2021-06-12 21:43:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:31,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:43:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:43:31,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:31,485 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 21:43:31,635 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-12 21:43:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:32,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769285641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:32,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:32,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015528316] [2021-06-12 21:43:32,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:32,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:32,153 INFO L87 Difference]: Start difference. First operand 3120 states and 14745 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:32,942 INFO L93 Difference]: Finished difference Result 3224 states and 15081 transitions. [2021-06-12 21:43:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:43:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:32,948 INFO L225 Difference]: With dead ends: 3224 [2021-06-12 21:43:32,948 INFO L226 Difference]: Without dead ends: 3215 [2021-06-12 21:43:32,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1617.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:43:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-12 21:43:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3107. [2021-06-12 21:43:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 4.74275595621378) internal successors, (14731), 3106 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 14731 transitions. [2021-06-12 21:43:33,012 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 14731 transitions. Word has length 30 [2021-06-12 21:43:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:33,012 INFO L482 AbstractCegarLoop]: Abstraction has 3107 states and 14731 transitions. [2021-06-12 21:43:33,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 14731 transitions. [2021-06-12 21:43:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:33,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:33,016 INFO L472 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:33,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:33,216 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1642624171, now seen corresponding path program 209 times [2021-06-12 21:43:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:33,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728063436] [2021-06-12 21:43:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:43:33,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728063436] [2021-06-12 21:43:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728063436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:33,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069453389] [2021-06-12 21:43:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:33,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:43:33,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:43:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:33,957 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 21:43:34,265 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-12 21:43:34,766 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-12 21:43:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:35,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:35,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:35,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:35,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:35,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:35,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:35,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:35,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:35,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:35,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:43:35,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:157, output treesize:129 [2021-06-12 21:43:41,308 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 21:43:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069453389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:41,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:41,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-06-12 21:43:41,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495135079] [2021-06-12 21:43:41,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:43:41,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:43:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=591, Unknown=1, NotChecked=0, Total=702 [2021-06-12 21:43:41,386 INFO L87 Difference]: Start difference. First operand 3107 states and 14731 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:49,911 INFO L93 Difference]: Finished difference Result 3919 states and 17589 transitions. [2021-06-12 21:43:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:43:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:49,920 INFO L225 Difference]: With dead ends: 3919 [2021-06-12 21:43:49,920 INFO L226 Difference]: Without dead ends: 3898 [2021-06-12 21:43:49,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 7899.0ms TimeCoverageRelationStatistics Valid=197, Invalid=992, Unknown=1, NotChecked=0, Total=1190 [2021-06-12 21:43:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-12 21:43:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2894. [2021-06-12 21:43:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 4.713100587625302) internal successors, (13635), 2893 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 13635 transitions. [2021-06-12 21:43:49,977 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 13635 transitions. Word has length 30 [2021-06-12 21:43:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:49,977 INFO L482 AbstractCegarLoop]: Abstraction has 2894 states and 13635 transitions. [2021-06-12 21:43:49,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 13635 transitions. [2021-06-12 21:43:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:49,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:49,982 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:50,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-06-12 21:43:50,182 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2118720273, now seen corresponding path program 210 times [2021-06-12 21:43:50,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:50,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184918125] [2021-06-12 21:43:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:50,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184918125] [2021-06-12 21:43:50,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184918125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751669677] [2021-06-12 21:43:50,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:50,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:43:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:43:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:51,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751669677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:51,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:51,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:51,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939125653] [2021-06-12 21:43:51,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:51,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:51,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:51,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:51,516 INFO L87 Difference]: Start difference. First operand 2894 states and 13635 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:51,944 INFO L93 Difference]: Finished difference Result 2935 states and 13749 transitions. [2021-06-12 21:43:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:43:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:51,950 INFO L225 Difference]: With dead ends: 2935 [2021-06-12 21:43:51,950 INFO L226 Difference]: Without dead ends: 2927 [2021-06-12 21:43:51,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1252.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:43:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-12 21:43:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2884. [2021-06-12 21:43:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 4.722858133888311) internal successors, (13616), 2883 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 13616 transitions. [2021-06-12 21:43:51,990 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 13616 transitions. Word has length 30 [2021-06-12 21:43:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:51,990 INFO L482 AbstractCegarLoop]: Abstraction has 2884 states and 13616 transitions. [2021-06-12 21:43:51,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 13616 transitions. [2021-06-12 21:43:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:51,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:51,993 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:52,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-12 21:43:52,194 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1459727147, now seen corresponding path program 211 times [2021-06-12 21:43:52,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:52,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051024975] [2021-06-12 21:43:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:52,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051024975] [2021-06-12 21:43:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051024975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618461061] [2021-06-12 21:43:52,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:43:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:53,346 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 21:43:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:53,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618461061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:53,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:53,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:53,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264199924] [2021-06-12 21:43:53,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:53,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:53,790 INFO L87 Difference]: Start difference. First operand 2884 states and 13616 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:54,842 INFO L93 Difference]: Finished difference Result 2956 states and 13808 transitions. [2021-06-12 21:43:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:43:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:54,848 INFO L225 Difference]: With dead ends: 2956 [2021-06-12 21:43:54,848 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 21:43:54,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1905.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:43:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 21:43:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2868. [2021-06-12 21:43:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 4.732472968259505) internal successors, (13568), 2867 states have internal predecessors, (13568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 13568 transitions. [2021-06-12 21:43:54,886 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 13568 transitions. Word has length 30 [2021-06-12 21:43:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:54,886 INFO L482 AbstractCegarLoop]: Abstraction has 2868 states and 13568 transitions. [2021-06-12 21:43:54,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 13568 transitions. [2021-06-12 21:43:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:54,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:54,890 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:55,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:55,091 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:55,091 INFO L82 PathProgramCache]: Analyzing trace with hash -355988215, now seen corresponding path program 212 times [2021-06-12 21:43:55,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:55,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336297653] [2021-06-12 21:43:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:43:55,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:55,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336297653] [2021-06-12 21:43:55,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336297653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:55,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055410823] [2021-06-12 21:43:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:55,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:43:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:43:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:55,946 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-12 21:43:56,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:56,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:56,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:56,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:56,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:56,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:56,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:43:56,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:56,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:56,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-12 21:43:56,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-12 21:43:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:43:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055410823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-12 21:43:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374475492] [2021-06-12 21:43:56,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:43:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:43:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:43:56,382 INFO L87 Difference]: Start difference. First operand 2868 states and 13568 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:57,135 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 21:43:57,347 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-12 21:43:57,512 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-12 21:43:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:57,748 INFO L93 Difference]: Finished difference Result 3055 states and 13736 transitions. [2021-06-12 21:43:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:43:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:57,754 INFO L225 Difference]: With dead ends: 3055 [2021-06-12 21:43:57,754 INFO L226 Difference]: Without dead ends: 3013 [2021-06-12 21:43:57,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1779.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:43:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-12 21:43:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2785. [2021-06-12 21:43:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 4.704741379310345) internal successors, (13098), 2784 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 13098 transitions. [2021-06-12 21:43:57,797 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 13098 transitions. Word has length 30 [2021-06-12 21:43:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:57,797 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 13098 transitions. [2021-06-12 21:43:57,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 13098 transitions. [2021-06-12 21:43:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:57,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:57,802 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:58,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable951 [2021-06-12 21:43:58,003 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash 325168051, now seen corresponding path program 213 times [2021-06-12 21:43:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:58,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134386803] [2021-06-12 21:43:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:58,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:58,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134386803] [2021-06-12 21:43:58,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134386803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338765297] [2021-06-12 21:43:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:58,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:43:58,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338765297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:59,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:59,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:43:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422774581] [2021-06-12 21:43:59,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:43:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:43:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:43:59,257 INFO L87 Difference]: Start difference. First operand 2785 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:59,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 21:44:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:00,985 INFO L93 Difference]: Finished difference Result 3385 states and 15139 transitions. [2021-06-12 21:44:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:44:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:00,993 INFO L225 Difference]: With dead ends: 3385 [2021-06-12 21:44:00,993 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 21:44:00,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2310.5ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:44:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 21:44:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2865. [2021-06-12 21:44:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.692039106145251) internal successors, (13438), 2864 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13438 transitions. [2021-06-12 21:44:01,042 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13438 transitions. Word has length 30 [2021-06-12 21:44:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:01,042 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13438 transitions. [2021-06-12 21:44:01,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13438 transitions. [2021-06-12 21:44:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:01,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:01,046 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:01,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-12 21:44:01,248 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1822744915, now seen corresponding path program 214 times [2021-06-12 21:44:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006946776] [2021-06-12 21:44:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:01,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006946776] [2021-06-12 21:44:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006946776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468584126] [2021-06-12 21:44:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:01,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:01,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:01,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:44:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:02,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:02,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:02,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:02,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:02,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:02,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:02,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:02,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:02,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:02,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:02,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:91 [2021-06-12 21:44:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468584126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:02,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:02,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 21:44:02,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728715045] [2021-06-12 21:44:02,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:44:02,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:44:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:44:02,284 INFO L87 Difference]: Start difference. First operand 2865 states and 13438 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:07,370 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-12 21:44:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:07,643 INFO L93 Difference]: Finished difference Result 3569 states and 15801 transitions. [2021-06-12 21:44:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:44:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:07,651 INFO L225 Difference]: With dead ends: 3569 [2021-06-12 21:44:07,651 INFO L226 Difference]: Without dead ends: 3527 [2021-06-12 21:44:07,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 5513.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:44:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-06-12 21:44:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2982. [2021-06-12 21:44:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.682321368668232) internal successors, (13958), 2981 states have internal predecessors, (13958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13958 transitions. [2021-06-12 21:44:07,701 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13958 transitions. Word has length 30 [2021-06-12 21:44:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:07,701 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 13958 transitions. [2021-06-12 21:44:07,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13958 transitions. [2021-06-12 21:44:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:07,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:07,705 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:07,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:07,906 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:07,906 INFO L82 PathProgramCache]: Analyzing trace with hash 844238639, now seen corresponding path program 215 times [2021-06-12 21:44:07,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:07,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037217356] [2021-06-12 21:44:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:08,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:08,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037217356] [2021-06-12 21:44:08,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037217356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:08,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248709438] [2021-06-12 21:44:08,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:08,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:44:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:08,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:08,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248709438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:08,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:08,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:44:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413607110] [2021-06-12 21:44:08,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:44:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:44:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:44:08,968 INFO L87 Difference]: Start difference. First operand 2982 states and 13958 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:09,408 INFO L93 Difference]: Finished difference Result 3047 states and 14149 transitions. [2021-06-12 21:44:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:44:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:09,414 INFO L225 Difference]: With dead ends: 3047 [2021-06-12 21:44:09,414 INFO L226 Difference]: Without dead ends: 3042 [2021-06-12 21:44:09,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:44:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-06-12 21:44:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2976. [2021-06-12 21:44:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.68436974789916) internal successors, (13936), 2975 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 13936 transitions. [2021-06-12 21:44:09,456 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 13936 transitions. Word has length 30 [2021-06-12 21:44:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:09,456 INFO L482 AbstractCegarLoop]: Abstraction has 2976 states and 13936 transitions. [2021-06-12 21:44:09,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 13936 transitions. [2021-06-12 21:44:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:09,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:09,460 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:09,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-12 21:44:09,660 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1600927089, now seen corresponding path program 216 times [2021-06-12 21:44:09,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:09,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979747462] [2021-06-12 21:44:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:09,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:09,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979747462] [2021-06-12 21:44:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979747462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:09,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156570801] [2021-06-12 21:44:09,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:10,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:44:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:10,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:10,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:10,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:10,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:10,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:10,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:10,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:10,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:10,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-12 21:44:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156570801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:44:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261819834] [2021-06-12 21:44:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:44:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:44:10,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:44:10,839 INFO L87 Difference]: Start difference. First operand 2976 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:11,860 INFO L93 Difference]: Finished difference Result 3127 states and 14283 transitions. [2021-06-12 21:44:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:44:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:11,866 INFO L225 Difference]: With dead ends: 3127 [2021-06-12 21:44:11,866 INFO L226 Difference]: Without dead ends: 3111 [2021-06-12 21:44:11,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1457.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:44:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-12 21:44:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2977. [2021-06-12 21:44:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 4.6875) internal successors, (13950), 2976 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 13950 transitions. [2021-06-12 21:44:11,911 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 13950 transitions. Word has length 30 [2021-06-12 21:44:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:11,911 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 13950 transitions. [2021-06-12 21:44:11,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 13950 transitions. [2021-06-12 21:44:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:11,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:11,916 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:12,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:12,116 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1654264789, now seen corresponding path program 217 times [2021-06-12 21:44:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:12,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147820090] [2021-06-12 21:44:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:12,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:12,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147820090] [2021-06-12 21:44:12,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147820090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:12,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556435733] [2021-06-12 21:44:12,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:44:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:13,009 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 21:44:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:13,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556435733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:13,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:13,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:44:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267755032] [2021-06-12 21:44:13,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:44:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:44:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:44:13,358 INFO L87 Difference]: Start difference. First operand 2977 states and 13950 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:14,981 INFO L93 Difference]: Finished difference Result 3332 states and 15161 transitions. [2021-06-12 21:44:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:44:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:14,987 INFO L225 Difference]: With dead ends: 3332 [2021-06-12 21:44:14,987 INFO L226 Difference]: Without dead ends: 3309 [2021-06-12 21:44:14,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2180.4ms TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:44:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-06-12 21:44:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3028. [2021-06-12 21:44:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 4.686157912124215) internal successors, (14185), 3027 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 14185 transitions. [2021-06-12 21:44:15,036 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 14185 transitions. Word has length 30 [2021-06-12 21:44:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:15,036 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 14185 transitions. [2021-06-12 21:44:15,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 14185 transitions. [2021-06-12 21:44:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:15,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:15,040 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:15,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-12 21:44:15,243 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash -161450573, now seen corresponding path program 218 times [2021-06-12 21:44:15,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:15,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391428599] [2021-06-12 21:44:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:15,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391428599] [2021-06-12 21:44:15,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391428599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122750608] [2021-06-12 21:44:15,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:15,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:44:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:44:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:16,091 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 21:44:16,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:16,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:16,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:16,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:16,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:16,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:16,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:16,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:16,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:16,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:16,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-12 21:44:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:44:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122750608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:16,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:16,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:44:16,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419584267] [2021-06-12 21:44:16,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:44:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:44:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:44:16,624 INFO L87 Difference]: Start difference. First operand 3028 states and 14185 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:17,481 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 21:44:17,722 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 21:44:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:20,158 INFO L93 Difference]: Finished difference Result 3185 states and 14482 transitions. [2021-06-12 21:44:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:44:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:20,164 INFO L225 Difference]: With dead ends: 3185 [2021-06-12 21:44:20,164 INFO L226 Difference]: Without dead ends: 3175 [2021-06-12 21:44:20,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2055.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:44:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-06-12 21:44:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3020. [2021-06-12 21:44:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 4.68532626697582) internal successors, (14145), 3019 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 14145 transitions. [2021-06-12 21:44:20,234 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 14145 transitions. Word has length 30 [2021-06-12 21:44:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:20,234 INFO L482 AbstractCegarLoop]: Abstraction has 3020 states and 14145 transitions. [2021-06-12 21:44:20,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 14145 transitions. [2021-06-12 21:44:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:20,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:20,238 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-12 21:44:20,441 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2045182677, now seen corresponding path program 219 times [2021-06-12 21:44:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626105739] [2021-06-12 21:44:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:20,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:20,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626105739] [2021-06-12 21:44:20,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626105739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:20,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659950332] [2021-06-12 21:44:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:20,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:44:20,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:44:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:21,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659950332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:21,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:21,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:44:21,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214449479] [2021-06-12 21:44:21,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:44:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:44:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:44:21,686 INFO L87 Difference]: Start difference. First operand 3020 states and 14145 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:22,655 INFO L93 Difference]: Finished difference Result 3462 states and 15765 transitions. [2021-06-12 21:44:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:44:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:22,662 INFO L225 Difference]: With dead ends: 3462 [2021-06-12 21:44:22,662 INFO L226 Difference]: Without dead ends: 3426 [2021-06-12 21:44:22,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1482.8ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:44:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-12 21:44:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3090. [2021-06-12 21:44:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 4.68824862415021) internal successors, (14482), 3089 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 14482 transitions. [2021-06-12 21:44:22,711 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 14482 transitions. Word has length 30 [2021-06-12 21:44:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:22,711 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 14482 transitions. [2021-06-12 21:44:22,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 14482 transitions. [2021-06-12 21:44:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:22,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:22,715 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:22,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-12 21:44:22,915 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1574669730, now seen corresponding path program 220 times [2021-06-12 21:44:22,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:22,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801244939] [2021-06-12 21:44:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:23,290 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 21:44:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:23,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801244939] [2021-06-12 21:44:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801244939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572345638] [2021-06-12 21:44:23,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:23,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:44:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:24,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:24,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:24,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:24,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:24,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:24,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:24,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:24,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:24,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:24,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:24,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:24,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:24,362 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-12 21:44:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:44:24,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572345638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:24,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:24,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-12 21:44:24,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135982246] [2021-06-12 21:44:24,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:44:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:44:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:44:24,493 INFO L87 Difference]: Start difference. First operand 3090 states and 14482 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:25,862 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-12 21:44:30,004 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 21:44:34,149 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-12 21:44:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:34,505 INFO L93 Difference]: Finished difference Result 4299 states and 19280 transitions. [2021-06-12 21:44:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:44:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:34,514 INFO L225 Difference]: With dead ends: 4299 [2021-06-12 21:44:34,514 INFO L226 Difference]: Without dead ends: 4284 [2021-06-12 21:44:34,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 10385.5ms TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:44:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-06-12 21:44:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3385. [2021-06-12 21:44:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 4.755910165484633) internal successors, (16094), 3384 states have internal predecessors, (16094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 16094 transitions. [2021-06-12 21:44:34,574 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 16094 transitions. Word has length 31 [2021-06-12 21:44:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:34,574 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 16094 transitions. [2021-06-12 21:44:34,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 16094 transitions. [2021-06-12 21:44:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:34,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:34,578 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:34,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable984,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:34,779 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:34,779 INFO L82 PathProgramCache]: Analyzing trace with hash -501858524, now seen corresponding path program 221 times [2021-06-12 21:44:34,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:34,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205316751] [2021-06-12 21:44:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:35,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:35,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205316751] [2021-06-12 21:44:35,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205316751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:35,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170759258] [2021-06-12 21:44:35,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:35,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:44:35,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:36,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170759258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:36,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:36,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:44:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636119880] [2021-06-12 21:44:36,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:44:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:44:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:44:36,140 INFO L87 Difference]: Start difference. First operand 3385 states and 16094 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:37,274 INFO L93 Difference]: Finished difference Result 3784 states and 17341 transitions. [2021-06-12 21:44:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:44:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:37,282 INFO L225 Difference]: With dead ends: 3784 [2021-06-12 21:44:37,282 INFO L226 Difference]: Without dead ends: 3754 [2021-06-12 21:44:37,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1834.8ms TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:44:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-12 21:44:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3427. [2021-06-12 21:44:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.752189141856392) internal successors, (16281), 3426 states have internal predecessors, (16281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 16281 transitions. [2021-06-12 21:44:37,336 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 16281 transitions. Word has length 31 [2021-06-12 21:44:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:37,336 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 16281 transitions. [2021-06-12 21:44:37,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 16281 transitions. [2021-06-12 21:44:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:37,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:37,341 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:37,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-12 21:44:37,541 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1313452132, now seen corresponding path program 222 times [2021-06-12 21:44:37,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:37,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910554468] [2021-06-12 21:44:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:37,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910554468] [2021-06-12 21:44:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910554468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414905939] [2021-06-12 21:44:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:37,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:44:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:44:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:38,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414905939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:38,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:38,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:44:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760343290] [2021-06-12 21:44:38,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:44:38,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:44:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:44:38,814 INFO L87 Difference]: Start difference. First operand 3427 states and 16281 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:39,953 INFO L93 Difference]: Finished difference Result 3523 states and 16535 transitions. [2021-06-12 21:44:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:44:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:39,960 INFO L225 Difference]: With dead ends: 3523 [2021-06-12 21:44:39,960 INFO L226 Difference]: Without dead ends: 3514 [2021-06-12 21:44:39,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1758.2ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:44:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-12 21:44:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3416. [2021-06-12 21:44:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 4.759590043923866) internal successors, (16254), 3415 states have internal predecessors, (16254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 16254 transitions. [2021-06-12 21:44:40,029 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 16254 transitions. Word has length 31 [2021-06-12 21:44:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:40,030 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 16254 transitions. [2021-06-12 21:44:40,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 16254 transitions. [2021-06-12 21:44:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:40,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:40,034 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:40,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable994,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:40,235 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash -977706982, now seen corresponding path program 223 times [2021-06-12 21:44:40,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:40,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253094782] [2021-06-12 21:44:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:40,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:40,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253094782] [2021-06-12 21:44:40,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253094782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:40,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859206537] [2021-06-12 21:44:40,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:40,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:44:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:41,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:41,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:41,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:41,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:41,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:41,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:41,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:41,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:157, output treesize:129 [2021-06-12 21:44:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:41,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859206537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:41,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:41,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-12 21:44:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400829559] [2021-06-12 21:44:41,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:44:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:44:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:44:41,650 INFO L87 Difference]: Start difference. First operand 3416 states and 16254 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:42,877 INFO L93 Difference]: Finished difference Result 4312 states and 19940 transitions. [2021-06-12 21:44:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:44:42,877 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:42,886 INFO L225 Difference]: With dead ends: 4312 [2021-06-12 21:44:42,886 INFO L226 Difference]: Without dead ends: 4297 [2021-06-12 21:44:42,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1669.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:44:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-12 21:44:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3442. [2021-06-12 21:44:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 4.745422842197036) internal successors, (16329), 3441 states have internal predecessors, (16329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 16329 transitions. [2021-06-12 21:44:42,943 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 16329 transitions. Word has length 31 [2021-06-12 21:44:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:42,944 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 16329 transitions. [2021-06-12 21:44:42,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 16329 transitions. [2021-06-12 21:44:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:42,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:42,948 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:43,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-12 21:44:43,149 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1892834208, now seen corresponding path program 224 times [2021-06-12 21:44:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:43,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516636689] [2021-06-12 21:44:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:43,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:43,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516636689] [2021-06-12 21:44:43,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516636689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:43,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562766810] [2021-06-12 21:44:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:44:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:44,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562766810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:44,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:44,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:44:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321609373] [2021-06-12 21:44:44,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:44:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:44:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:44:44,314 INFO L87 Difference]: Start difference. First operand 3442 states and 16329 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:44,833 INFO L93 Difference]: Finished difference Result 3497 states and 16477 transitions. [2021-06-12 21:44:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:44:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:44,839 INFO L225 Difference]: With dead ends: 3497 [2021-06-12 21:44:44,840 INFO L226 Difference]: Without dead ends: 3488 [2021-06-12 21:44:44,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:44:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-06-12 21:44:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3445. [2021-06-12 21:44:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.745354239256678) internal successors, (16343), 3444 states have internal predecessors, (16343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 16343 transitions. [2021-06-12 21:44:44,888 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 16343 transitions. Word has length 31 [2021-06-12 21:44:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:44,888 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 16343 transitions. [2021-06-12 21:44:44,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 16343 transitions. [2021-06-12 21:44:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:44,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:44,893 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:45,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1014 [2021-06-12 21:44:45,093 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 262643294, now seen corresponding path program 225 times [2021-06-12 21:44:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:45,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74140936] [2021-06-12 21:44:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:45,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74140936] [2021-06-12 21:44:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74140936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984864794] [2021-06-12 21:44:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:45,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:44:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:44:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:46,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:46,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:46,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:46,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:46,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:46,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:46,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:46,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:46,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:46,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:44:46,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:46,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-12 21:44:46,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-12 21:44:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:46,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984864794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:46,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:46,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-12 21:44:46,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528866115] [2021-06-12 21:44:46,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:44:46,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:44:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:44:46,445 INFO L87 Difference]: Start difference. First operand 3445 states and 16343 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:47,989 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 21:44:52,110 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 21:44:56,260 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-12 21:44:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:56,575 INFO L93 Difference]: Finished difference Result 6226 states and 27707 transitions. [2021-06-12 21:44:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:44:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:56,588 INFO L225 Difference]: With dead ends: 6226 [2021-06-12 21:44:56,589 INFO L226 Difference]: Without dead ends: 6145 [2021-06-12 21:44:56,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 10187.9ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:44:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-06-12 21:44:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 3919. [2021-06-12 21:44:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-12 21:44:56,667 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-12 21:44:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:56,667 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-12 21:44:56,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-12 21:44:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:56,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:56,673 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:56,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-12 21:44:56,874 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1233841082, now seen corresponding path program 226 times [2021-06-12 21:44:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:56,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608449998] [2021-06-12 21:44:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608449998] [2021-06-12 21:44:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608449998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658533031] [2021-06-12 21:44:57,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:57,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:57,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:44:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:57,791 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-12 21:44:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658533031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:58,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:58,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:44:58,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810796714] [2021-06-12 21:44:58,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:44:58,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:44:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:44:58,241 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:58,893 INFO L93 Difference]: Finished difference Result 3997 states and 19173 transitions. [2021-06-12 21:44:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:44:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:44:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:58,901 INFO L225 Difference]: With dead ends: 3997 [2021-06-12 21:44:58,901 INFO L226 Difference]: Without dead ends: 3984 [2021-06-12 21:44:58,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1448.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:44:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-12 21:44:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3919. [2021-06-12 21:44:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-12 21:44:58,960 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-12 21:44:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:58,960 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-12 21:44:58,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-12 21:44:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:44:58,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:58,965 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:59,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-12 21:44:59,166 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash 110356286, now seen corresponding path program 227 times [2021-06-12 21:44:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:59,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355090626] [2021-06-12 21:44:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:59,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:59,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355090626] [2021-06-12 21:44:59,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355090626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:59,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687290582] [2021-06-12 21:44:59,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:59,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:44:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:44:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:00,018 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-12 21:45:00,341 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_208, client], 1=[node_1]} [2021-06-12 21:45:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:45:00,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:00,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:45:00,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:00,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:00,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:45:00,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:00,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:45:00,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:45:00,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:00,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:00,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-12 21:45:00,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-06-12 21:45:04,674 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 21:45:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:45:04,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687290582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:04,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:04,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:45:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228998087] [2021-06-12 21:45:04,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:45:04,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:45:04,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=667, Unknown=1, NotChecked=0, Total=756 [2021-06-12 21:45:04,771 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:05,189 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-12 21:45:05,374 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-12 21:45:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:10,081 INFO L93 Difference]: Finished difference Result 4125 states and 19314 transitions. [2021-06-12 21:45:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:45:10,082 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:10,090 INFO L225 Difference]: With dead ends: 4125 [2021-06-12 21:45:10,090 INFO L226 Difference]: Without dead ends: 4089 [2021-06-12 21:45:10,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5462.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1403, Unknown=1, NotChecked=0, Total=1560 [2021-06-12 21:45:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-12 21:45:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3833. [2021-06-12 21:45:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.840814196242171) internal successors, (18550), 3832 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 18550 transitions. [2021-06-12 21:45:10,153 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 18550 transitions. Word has length 31 [2021-06-12 21:45:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:10,153 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 18550 transitions. [2021-06-12 21:45:10,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 18550 transitions. [2021-06-12 21:45:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:10,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:10,160 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-12 21:45:10,361 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1439139550, now seen corresponding path program 228 times [2021-06-12 21:45:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325208599] [2021-06-12 21:45:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:45:10,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325208599] [2021-06-12 21:45:10,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325208599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432807227] [2021-06-12 21:45:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:10,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:45:10,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:10,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:10,792 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-12 21:45:11,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:45:11,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:11,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-12 21:45:11,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:11,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:11,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:11,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:64, output treesize:50 [2021-06-12 21:45:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:11,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432807227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:11,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:11,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-12 21:45:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207186843] [2021-06-12 21:45:11,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:45:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:45:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:45:11,522 INFO L87 Difference]: Start difference. First operand 3833 states and 18550 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:11,972 INFO L93 Difference]: Finished difference Result 6856 states and 32904 transitions. [2021-06-12 21:45:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:45:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:11,990 INFO L225 Difference]: With dead ends: 6856 [2021-06-12 21:45:11,990 INFO L226 Difference]: Without dead ends: 6795 [2021-06-12 21:45:11,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1115.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:45:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-12 21:45:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 4695. [2021-06-12 21:45:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.002556455048999) internal successors, (23482), 4694 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23482 transitions. [2021-06-12 21:45:12,089 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23482 transitions. Word has length 31 [2021-06-12 21:45:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:12,089 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23482 transitions. [2021-06-12 21:45:12,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23482 transitions. [2021-06-12 21:45:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:12,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:12,097 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:12,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:12,297 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 772594686, now seen corresponding path program 229 times [2021-06-12 21:45:12,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:12,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954977492] [2021-06-12 21:45:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:12,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954977492] [2021-06-12 21:45:12,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954977492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936490491] [2021-06-12 21:45:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:13,128 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 21:45:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:13,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936490491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:13,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:13,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:45:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959063264] [2021-06-12 21:45:13,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:45:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:45:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:45:13,660 INFO L87 Difference]: Start difference. First operand 4695 states and 23482 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:14,346 INFO L93 Difference]: Finished difference Result 4746 states and 23612 transitions. [2021-06-12 21:45:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:45:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:14,357 INFO L225 Difference]: With dead ends: 4746 [2021-06-12 21:45:14,357 INFO L226 Difference]: Without dead ends: 4733 [2021-06-12 21:45:14,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1437.9ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:45:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-12 21:45:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4681. [2021-06-12 21:45:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 5.013034188034188) internal successors, (23461), 4680 states have internal predecessors, (23461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 23461 transitions. [2021-06-12 21:45:14,435 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 23461 transitions. Word has length 31 [2021-06-12 21:45:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:14,435 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 23461 transitions. [2021-06-12 21:45:14,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 23461 transitions. [2021-06-12 21:45:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:14,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:14,443 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:14,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-12 21:45:14,643 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1688987100, now seen corresponding path program 230 times [2021-06-12 21:45:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:14,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987213765] [2021-06-12 21:45:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:15,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987213765] [2021-06-12 21:45:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987213765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127464721] [2021-06-12 21:45:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:15,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:45:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:45:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:15,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 21:45:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:15,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127464721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:15,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:15,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:45:15,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307734525] [2021-06-12 21:45:15,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:45:15,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:15,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:45:15,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:45:15,992 INFO L87 Difference]: Start difference. First operand 4681 states and 23461 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:16,780 INFO L93 Difference]: Finished difference Result 4755 states and 23651 transitions. [2021-06-12 21:45:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:45:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:16,790 INFO L225 Difference]: With dead ends: 4755 [2021-06-12 21:45:16,790 INFO L226 Difference]: Without dead ends: 4742 [2021-06-12 21:45:16,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:45:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-06-12 21:45:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2021-06-12 21:45:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 5.007027257240204) internal successors, (23513), 4696 states have internal predecessors, (23513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 23513 transitions. [2021-06-12 21:45:16,866 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 23513 transitions. Word has length 31 [2021-06-12 21:45:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:16,866 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 23513 transitions. [2021-06-12 21:45:16,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 23513 transitions. [2021-06-12 21:45:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:16,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:16,873 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:17,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:17,073 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1029993974, now seen corresponding path program 231 times [2021-06-12 21:45:17,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:17,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295221984] [2021-06-12 21:45:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:17,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295221984] [2021-06-12 21:45:17,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295221984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:17,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668634107] [2021-06-12 21:45:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:17,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:45:17,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:45:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:17,914 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:45:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668634107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:18,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:45:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453807297] [2021-06-12 21:45:18,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:45:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:45:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:45:18,520 INFO L87 Difference]: Start difference. First operand 4697 states and 23513 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:19,238 INFO L93 Difference]: Finished difference Result 5035 states and 24640 transitions. [2021-06-12 21:45:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:45:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:19,250 INFO L225 Difference]: With dead ends: 5035 [2021-06-12 21:45:19,250 INFO L226 Difference]: Without dead ends: 5011 [2021-06-12 21:45:19,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1494.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:45:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-12 21:45:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4691. [2021-06-12 21:45:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 5.010234541577825) internal successors, (23498), 4690 states have internal predecessors, (23498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 23498 transitions. [2021-06-12 21:45:19,333 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 23498 transitions. Word has length 31 [2021-06-12 21:45:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:19,333 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 23498 transitions. [2021-06-12 21:45:19,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 23498 transitions. [2021-06-12 21:45:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:19,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:19,341 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:19,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:19,541 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:19,542 INFO L82 PathProgramCache]: Analyzing trace with hash 632601598, now seen corresponding path program 232 times [2021-06-12 21:45:19,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:19,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124812019] [2021-06-12 21:45:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:19,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124812019] [2021-06-12 21:45:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124812019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890567008] [2021-06-12 21:45:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:19,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:45:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:21,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890567008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:21,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:21,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 21:45:21,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422322328] [2021-06-12 21:45:21,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:45:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:21,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:45:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:45:21,014 INFO L87 Difference]: Start difference. First operand 4691 states and 23498 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:21,558 INFO L93 Difference]: Finished difference Result 4753 states and 23660 transitions. [2021-06-12 21:45:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:45:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:45:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:21,570 INFO L225 Difference]: With dead ends: 4753 [2021-06-12 21:45:21,570 INFO L226 Difference]: Without dead ends: 4744 [2021-06-12 21:45:21,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:45:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-06-12 21:45:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4695. [2021-06-12 21:45:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.008308478909246) internal successors, (23509), 4694 states have internal predecessors, (23509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23509 transitions. [2021-06-12 21:45:21,674 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23509 transitions. Word has length 31 [2021-06-12 21:45:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:21,674 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23509 transitions. [2021-06-12 21:45:21,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23509 transitions. [2021-06-12 21:45:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:45:21,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:21,682 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:21,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:21,883 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1503896890, now seen corresponding path program 233 times [2021-06-12 21:45:21,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:21,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32247511] [2021-06-12 21:45:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:22,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:22,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32247511] [2021-06-12 21:45:22,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32247511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:22,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318660888] [2021-06-12 21:45:22,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:22,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:45:22,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:22,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 21:45:22,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:22,572 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:45:22,574 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:45:22,576 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:45:22,576 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:45:22 BasicIcfg [2021-06-12 21:45:22,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:45:22,576 INFO L168 Benchmark]: Toolchain (without parser) took 830029.74 ms. Allocated memory was 127.9 MB in the beginning and 769.7 MB in the end (delta: 641.7 MB). Free memory was 107.9 MB in the beginning and 506.7 MB in the end (delta: -398.8 MB). Peak memory consumption was 244.2 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:22,576 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:45:22,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 127.9 MB. Free memory was 107.8 MB in the beginning and 106.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:22,576 INFO L168 Benchmark]: Boogie Preprocessor took 22.52 ms. Allocated memory is still 127.9 MB. Free memory was 106.4 MB in the beginning and 105.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:22,576 INFO L168 Benchmark]: RCFGBuilder took 518.93 ms. Allocated memory was 127.9 MB in the beginning and 178.3 MB in the end (delta: 50.3 MB). Free memory was 105.1 MB in the beginning and 150.0 MB in the end (delta: -44.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:22,576 INFO L168 Benchmark]: TraceAbstraction took 829458.32 ms. Allocated memory was 178.3 MB in the beginning and 769.7 MB in the end (delta: 591.4 MB). Free memory was 149.6 MB in the beginning and 506.7 MB in the end (delta: -357.1 MB). Peak memory consumption was 235.1 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:22,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 127.9 MB. Free memory was 107.8 MB in the beginning and 106.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.52 ms. Allocated memory is still 127.9 MB. Free memory was 106.4 MB in the beginning and 105.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 518.93 ms. Allocated memory was 127.9 MB in the beginning and 178.3 MB in the end (delta: 50.3 MB). Free memory was 105.1 MB in the beginning and 150.0 MB in the end (delta: -44.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 829458.32 ms. Allocated memory was 178.3 MB in the beginning and 769.7 MB in the end (delta: 591.4 MB). Free memory was 149.6 MB in the beginning and 506.7 MB in the end (delta: -357.1 MB). Peak memory consumption was 235.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 19 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 829363.0ms, OverallIterations: 276, TraceHistogramMax: 9, EmptinessCheckTime: 641.7ms, AutomataDifference: 352105.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10784 SDtfs, 18270 SDslu, 147784 SDs, 0 SdLazy, 86368 SolverSat, 5014 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 68061.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11732 GetRequests, 4224 SyntacticMatches, 10 SemanticMatches, 7498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40786 ImplicationChecksByTransitivity, 626162.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4697occurred in iteration=273, InterpolantAutomatonStates: 4402, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6569.6ms AutomataMinimizationTime, 275 MinimizatonAttempts, 47814 StatesRemovedByMinimization, 270 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2334.4ms SsaConstructionTime, 7061.7ms SatisfiabilityAnalysisTime, 397825.0ms InterpolantComputationTime, 14122 NumberOfCodeBlocks, 14121 NumberOfCodeBlocksAsserted, 1218 NumberOfCheckSat, 13576 ConstructedInterpolants, 769 QuantifiedInterpolants, 280854 SizeOfPredicates, 3657 NumberOfNonLiveVariables, 20578 ConjunctsInSsa, 5114 ConjunctsInUnsatCore, 546 InterpolantComputations, 4 PerfectInterpolantSequences, 1937/15440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown